Giúp tớ với mai nộp bài rồi 
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C
0
2D
0
MN
3
GIÚP TỚ VỚI MAI NỘP RỒI
KV
24 tháng 10 2023
a) Do BD là tia phân giác của ABC (gt)
⇒ ∠ABD = ∠CBD = 90⁰ : 2 = 45⁰
Do MN // AB (gt)
AB ⊥ BC (gt)
⇒ MN ⊥ BC
⇒ ∠INB = 90⁰
⇒ ∆INB vuông tại N
⇒ ∠BIN = 90⁰ - ∠IBN
= 90⁰ - ∠CBD
= 90⁰ - 45⁰
= 45⁰
⇒ ∠MID = ∠BIN = 45⁰ (đối đỉnh)
b) MN ⊥ BC (đã chứng minh ở câu a)
TT
giúp tớ với mai tớ nộp rồi làm câu b và c cux đc ạ.
1
29 tháng 3 2023
a: Xet ΔABC có AD/AB=AE/AC
nên DE//CB
b: DE//BC
AH vuông góc BC
=>AH vuông góc DE
ΔADE cân tại A
mà AH là đường cao
nên AH là trung trực của DE
c: ΔCBA đều
mà BF là trung tuyến
nên BF vuông góc AC
RD
3
TT
0
1 tháng 12 2016
to become a good student
If you really want to assert yourself, you must have strong determination, whether "running change, a remarkable" remains firm. RESOLVED to do to the same.
1d 24h = 1440 = '. In which at least 7 = 420 'you have to sleep; 1.5h = 90 'you eat; 4h = 240 'you go to school; 1.5h = 90 'you use to communicate with family and loved ones to rest.
Left: 24 - 7 to 1.5 - 4 to 1.5 = 10h = 600 'you use to learn. Each school you should break 1h 10'-15 '. Thus, if you learn in 4 hours continuously (max) 1h then you go play.
So there is too much or too little time for you to use 1d?
With 1bai normal math in textbooks, the average time to resolution is 10'-20 '. If you draft first, you try to find at least two ways to address and choose a shorter way to write in their notebooks. In fact, according to her, her unlimited time to find solutions or as it may apply the solutions that in another post. Limit their time solving the shortest it, for example only a 5 '/ 1bai.
For the lesson of, you read the entire article before 1-2lan. Then closed her book, write down what you remember draft. Opened it, check. Find gist bulleted, writing drafts (drawn haphazardly written restrictions on books). 1lan reread what you wrote. 1lan what reread the book. Closed book, look for the bullet reread and development are based on what you remember. Rereading in books 1lan. Binding reread. So you can be in all yet?
...
I do not write all the way to become a gifted 1hoc. I want you to find out more thinking how fit you to become 1hoc gifted.
study well!
5 to see
6 to go
7 working
8 working
9 talking
10 opening
11 wearing
12 to go
13 to watch
14 to brush
15 to phone
16 to be - listen
17 to go
18 reading
19 living - talking
20 playing
21 buying
Thank kiu cou nhá