1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kotykmax [81]
3 years ago
7

cho tứ giác ABCD. Gọi M,N,P,Q là trung điểm của các cạnh AB, CD, AD, BC. Chứng minh rằng vecto MP = vecto QN, vecto MQ = vecto P

N
Mathematics
1 answer:
Dmitriy789 [7]3 years ago
4 0

Answer:

Step-by-step explanation:

Xét tam giác DAB có: P là trung điểm AD, M là trung điểm AB

=> MP là đường trung bình của tam giác DAB => MP//BD và MP=\frac{1}{2}BD  (1)

Xét tam giác DBC có: N là trung điểm DC, Q là trung điểm BC

=> QN là đường trung bình của tam giác DBC => QN//BD và QN=\frac{1}{2}BD  (2)

Từ (1) và (2) => vecto MP song song cùng chiều với vecto QN

và độ dài MP = độ dài QN = \frac{1}{2}BD

=> vecto MP = vecto QN

Tương tự xét các tam giác DAC và tam giác ABC => vecto MQ = vecto PN

You might be interested in
-5,0,5,10...<br>cual es su exprecion algebraica<br>doy corona​
TEA [102]
Y=x + 5 is the answer
4 0
3 years ago
Calculate the area of the shapes below.
GREYUIT [131]

Answer:

the answer should be 24ft

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Simplify each expression
svp [43]
Hope this helps you

3 0
3 years ago
Read 2 more answers
What is the answer to 5 3x + 12- 6x = -9
Katarina [22]

Answer:

x=-21/47

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Suppose f(x)=x^2 -8 evaluate f(2)-f(3)​
Westkost [7]

Answer:

f(2)= -4 f(3)= 1

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Friends please help I don’t understand this!.
    15·2 answers
  • alaska has a land area of aboit 1,700,00 square kilometers. Florida has a land area 1/10 the size of Alaska. What is the land ar
    8·1 answer
  • The multiplicative inverse of - 5 and 10v - 5
    14·1 answer
  • Solving a word problem?
    13·1 answer
  • If the smallest angle of a triangle is 20 degrees and it is included between sides of 4 and 7, then (to the nearest tenth) the s
    11·2 answers
  • Which of these foods has the most calories per ounce?
    10·1 answer
  • What is the simplified form of<br> 6.8x + (-8.9)+(-6.8x) + 8.9?<br> Explain how you know.
    7·1 answer
  • At 11 p.M., it was 48°F. The temperature was 6° cooler by 7 a.M. By 11 a.M. The temperature was 48°F again. What integer represe
    5·1 answer
  • The boys’ soccer team is having a celebration at the end of the season. There are 8 boys on the team and they have ordered 11 pi
    9·2 answers
  • Please help ASAP !! Will mark brainless to whoever gets it right
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!