Question

Let triangle ABC be congruent to triangle DEF, if area of triangle ABC= 100cmsquare, area of triangle DEF= 196cmsquare and DE = 7cm then find AB

Answer 1

Answer:

5 cm

please mark as brainliest

Answer 2

Step-by-step explanation:

Step-by-step explanation:∆ABC =∆DEF

Step-by-step explanation:∆ABC =∆DEF area of ∆ABC =100 sq.cm

area of ∆DEF =196sq.cm.

A(∆ABC) / A(∆DEF) = AB²/DE². theorem of similar triangles

100/196=AB² /7²

10/14 =AB/7......... taking sqaure root

cross multiplying

we get

10×7 =70

70/14 =5

AB=5