Hình chữ nhật có chiều dài là 24m, chiều rộng 12m. Hình thoi đó 4 góc có trung điểm là 3m. Tính:
a/ Diện tích hình thoi.
b/ Diện tích phần tô đậm.
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Last year , on summer holiday , when I had just passed the entrance exam to Ha Noi University of technology , my father took me to Ho Chi Minh city for a few days . As being eager for the trip , I prepared many things such as clothes , camera ... Eventually it came . When we got on the plane , I was very glad and the flight took off pricise time . Un almost everyone who felt ill at the beginning of the flight , I felt very comfortable . When the plane was floating in the air , I looked over the windown of the plane . Oh , I saw an incredibly beautiful scene . Everything was only lights that were sparkling and subtle . Two hours and a half later , we arrived in Ho Chi Minh city . We caught a taxi to go straight to my uncle’s house which nearly the airport . Next day , we woke up early , preparing to visit the city on my uncle’s motorbike . Who didn’t know that the streets in HCM city were as crowded as in HN city and I found that everyone was in a hurry . First , we stopped at DamSen water park where I enjoyed many aqua games slipping from a whirl of water , slithering in gutter , rolling with water and so do on . After that , we had a excellent lunch there . The foods was arranged as a party with many , many dishes : grill leg of turkey , bacon , beef , big crab , lobster , salmon , tuna , etc with various drinks such as cocacola , pepsi , beer and some wine made from grapes . After a while , my belly was full but I still was eatting some dessert . There are some dessert to choose such as melon , grapes , pear . Finally , I got a cup of coffee . I was very relaxed by flourve of it . Next , we slept for a long time and then drove motorbike in the streets about nightfall .We went snowly by motorbike and there were so many fun gave me on the day . Nightlife was animate . All shop was being opened with colourful lights , many vehicles were going in the streets and some people were going on foot in pavement to the streets became bustling and clamourous . About ten o’clock , we went back home to ready for next day that is enjoyable . It’s joyful memory . Furthermore , it’s reward to me for I passed one's examination to studying at HUT so it remind me that I must try to study very well
my summer holiday, I did not do something special and did not go somewhere special except Chamonix and Venice. Most of my holiday was showing friends of my parents and my grandparents the most important and the most beautiful places of Geneva and its surroundings.
I started the summer holiday before everyone (6 days before). That was because of my grandparents. Well, it first started off when my grand parents came. We were going by car where my grandmother wouldn't walk and I was walking with my grandfather. Because my grandfather s walking and my grandmother doesn't. Well they stayed for 1 month and went back to Turkey. The next visitors were my mother's schoolmates (can you believe it!!). They stayed one month as well. We kind of went to same places, when they were gone that was the fun. We went to Chamonix and Venice.
The best thing there was the Jacuzzi and the pool. In Chamonix, the mountains haven. The highest there was Mont-Blanc and Auguille du Midi. We climbed with a cable car; it was totally amazing and extremely cold. This point was 3842 meters high. And, of course, I should not forget Venice, it was also a haven but I didn't see much because we had small amount of time. The most amazing thing was the square of San Marco Polo and then the gondolas.
The thing I really d about my holiday was getting a brand new VW Passat and seeing my grandparents (first time in two years).
At 3.00 P.M , I'm watching TV and at 5.00 pm , I plays football with my friends. After play footbal my friends often have money and we go to the shop and buy jelly, and eat
The nature which makes the life possible on Earth also have enough power to transform the world drasally. The unprecedented movement of Earth causes many of deadliest natural disasters Earthquakes, Tsunamis, Volcanic eruptions and landslides. Followings are seven most dangerous natural disasters on Earth.
7 Landslides
Landslides is a geological activity in which falling of rocks and soil occur down a slope of land. Heavy rains, small earthquakes , volcano eruptions and of course the gravitational force are the driving forces of landslide. The human activities mining, construction and quarrying also cause landsliding. The movement of soil away from the actual foundation, sudden decrease in ground water level and cracking of ground are indication of landslides.
Main landslide prone areas
6 Volcanic eruptions
Volcanoes are actually an opening from the inner part of Earth to the surface. Volcanic eruption emerges ashes, hot lava and poisonous gases. The convergence and divergence of tectonic plates under Earth which causes the formation of volcanoes. Mainly volcanoes are found in mid Atlan and pacific ridge.
A volcanic eruption happens when the pressure on magma chamber inside Earth increase and push magma to surface through volcanic vents. Volcanic eruptions will destroy the surrounding areas, aircrafts, also heaten up the atmosphere. Volcanic tremor, small earthquake near volcano, ejection of steam and gases are the indication of volcanic eruptions.
Most active volcanoes in the world
5 Tornadoes
Tornadoes are strong, violently rotating air storm initiate from clouds to surface of earth. Some violent tornadoes achieve wind speed up to 300 miles per hour. Tornadoes are normally found in condensation funnel shape, also holds several shape depending on pressure of air. The thunder storms, mixing up of cold, moist air with hot air makes instability and violent tornadoes will form.
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Tornadoes have enough power to destroy the entire city and uproot trees. Such violent storm can be found within all continents except Antarca. Tornado alley (region that covers North Texas, Oklahoma, Kansas and Nebraska) is the most tornado-prone area in the world.
Top most tornado prone areas in the world
4 Lightning
Lightning is natural formation of electricity and flows through air a flash. Due to the collision between ice gained cloud formation of charges will take place at beneath of clouds, once charge concentrate at any point on earth a sudden flow of electricity will pass. It can be mountains, trees, animals or humans. Lightning have temperature up to 54000 degree Fahrenheit, approximately six times hotter than surface of Sun.
There are 100 lightning strikes in every second on Earth that have enough power to destroy everything within no time. The presence of dark clouds in the sky is the indication of lightning, thunders also sounds this disaster. Lightning mainly hits in the areas where instability of environment, variation of temperate or pressure occurs.
3 Tsunamis
Tsunamis or tidal waves formed due to the Earthquakes, volcanic eruption or other form of disturbance in oceans. Tsunami tides have heights of hundreds of meters and large wavelength. Such tidal waves will travel thousands of miles and mainly hits coastal areas. Tsunamis have greater speed at deep water in ocean. The speed decreases as it approaches coastal areas but have greater height. The retrieval of waves is the main indication of Tsunamis.
Top most Tsunami prone countries in the world
2 Hurricanes
Hurricanes are powerful rapidly rotating storm system mainly hit over tropical seas. Hurricanes are also called as typhoon, cyclone collectively known as tropical cyclones. Hurricanes will spread across 600 miles rotate inward and upward at 70 to 200 miles per hour speed.
Hurricanes are formed where ocean water with temperate above 80 degree F and wind blows in same direction that of upward force. The evaporation from sea water also increases the force of hurricane. But no such hurricanes hit lands with same power as it gained from source, have enough power to generate heavy rain, high waves an strong winds.
Top most hurricane prone cities in the world
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1 Earthquakes
Earthquakes are one of the most dangerous disasters ever faced by the human. Earth’s surface holds number of plates called tectonic. Such plates have rough edges and they always keep moving and slide over each other.
As the tectonic plate surface have faults the gets stuck while sliding and remaining parts keeps moving. Whenever the force of these plates overcomes the friction the energy gets released in the form of seismic waves and shakes the outer world.ere are thousands of earthquakes happens across the world everyday. But most of them are too small to be detect and some have the power to destroy everything.
Top most earthquake prone cities in the world
The nature which makes the life possible on Earth also have enough power to transform the world drasally. The unprecedented movement of Earth causes many of deadliest natural disasters Earthquakes, Tsunamis, Volcanic eruptions and landslides. Followings are seven most dangerous natural disasters on Earth.
7 Landslides
Landslides is a geological activity in which falling of rocks and soil occur down a slope of land. Heavy rains, small earthquakes , volcano eruptions and of course the gravitational force are the driving forces of landslide. The human activities mining, construction and quarrying also cause landsliding. The movement of soil away from the actual foundation, sudden decrease in ground water level and cracking of ground are indication of landslides.
Main landslide prone areas
6 Volcanic eruptions
Volcanoes are actually an opening from the inner part of Earth to the surface. Volcanic eruption emerges ashes, hot lava and poisonous gases. The convergence and divergence of tectonic plates under Earth which causes the formation of volcanoes. Mainly volcanoes are found in mid Atlan and pacific ridge.
A volcanic eruption happens when the pressure on magma chamber inside Earth increase and push magma to surface through volcanic vents. Volcanic eruptions will destroy the surrounding areas, aircrafts, also heaten up the atmosphere. Volcanic tremor, small earthquake near volcano, ejection of steam and gases are the indication of volcanic eruptions.
Most active volcanoes in the world
5 Tornadoes
Tornadoes are strong, violently rotating air storm initiate from clouds to surface of earth. Some violent tornadoes achieve wind speed up to 300 miles per hour. Tornadoes are normally found in condensation funnel shape, also holds several shape depending on pressure of air. The thunder storms, mixing up of cold, moist air with hot air makes instability and violent tornadoes will form.
An Email A Day Keeps Boring Away
Grab our Newsletter. Never miss a list from TMW.
Tornadoes have enough power to destroy the entire city and uproot trees. Such violent storm can be found within all continents except Antarca. Tornado alley (region that covers North Texas, Oklahoma, Kansas and Nebraska) is the most tornado-prone area in the world.
Top most tornado prone areas in the world
4 Lightning
Lightning is natural formation of electricity and flows through air a flash. Due to the collision between ice gained cloud formation of charges will take place at beneath of clouds, once charge concentrate at any point on earth a sudden flow of electricity will pass. It can be mountains, trees, animals or humans. Lightning have temperature up to 54000 degree Fahrenheit, approximately six times hotter than surface of Sun.
There are 100 lightning strikes in every second on Earth that have enough power to destroy everything within no time. The presence of dark clouds in the sky is the indication of lightning, thunders also sounds this disaster. Lightning mainly hits in the areas where instability of environment, variation of temperate or pressure occurs.
3 Tsunamis
Tsunamis or tidal waves formed due to the Earthquakes, volcanic eruption or other form of disturbance in oceans. Tsunami tides have heights of hundreds of meters and large wavelength. Such tidal waves will travel thousands of miles and mainly hits coastal areas. Tsunamis have greater speed at deep water in ocean. The speed decreases as it approaches coastal areas but have greater height. The retrieval of waves is the main indication of Tsunamis.
Top most Tsunami prone countries in the world
2 Hurricanes
Hurricanes are powerful rapidly rotating storm system mainly hit over tropical seas. Hurricanes are also called as typhoon, cyclone collectively known as tropical cyclones. Hurricanes will spread across 600 miles rotate inward and upward at 70 to 200 miles per hour speed.
Hurricanes are formed where ocean water with temperate above 80 degree F and wind blows in same direction that of upward force. The evaporation from sea water also increases the force of hurricane. But no such hurricanes hit lands with same power as it gained from source, have enough power to generate heavy rain, high waves an strong winds.
Top most hurricane prone cities in the world
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1 Earthquakes
Earthquakes are one of the most dangerous disasters ever faced by the human. Earth’s surface holds number of plates called tectonic. Such plates have rough edges and they always keep moving and slide over each other.
As the tectonic plate surface have faults the gets stuck while sliding and remaining parts keeps moving. Whenever the force of these plates overcomes the friction the energy gets released in the form of seismic waves and shakes the outer world.ere are thousands of earthquakes happens across the world everyday. But most of them are too small to be detect and some have the power to destroy everything.
Top most earthquake prone cities in the world
Nam, bạn như thế nào hôm nay
bạn có bệnh không
bạn phải đi đến bệnh viện
bạn bị sổ mũi rồi
chúc bạn học tốt>.<
A,Diện tích hình thoi là:
3x3:2=4,5{m}
Diện tích hình chữ nhật là:
24x12=288{m}
B,Diiện tích phần tô đậm là:
288-4,5=283,5{m}
Đáp số:a.4,5m
b.283,5m