Let triangle ABC similar to triangle DEF ,if ar(ABC)=100 cm sq. ,ar(DEF)=196 cm sq. and DE=7cm . Then find AB
Answers
Answered by
32
Solve-are(ABC)/are(DEF)=(AB)^2/(DE)^2
100/196=AB^2/7^2
10/14=AB/7
70=14AB
AB=70/14
AB=5
100/196=AB^2/7^2
10/14=AB/7
70=14AB
AB=70/14
AB=5
Answered by
15
Answer:
The answer is 5cm
Step-by-step explanation:
Area of ABC/ Area of DEF = AB*AB /DE*DE
100/196 = x*x /7*7
100/196 = X2 /49
x2 = 100*7/196
x2 = 25cm
x = 5cm
So AB = 5cm
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