Question

If triangle abc similar to triangle pqr ,ar(triangle abc)/ar(triangle pqr) = 9/4 & pq = 8cm , then find the length of ab.

Answer 1

Here is ur ans

ar(trian.abc)/ar(trian.pqr)=(ab)^2/(pq)^2

9/4=(ab)^2/(8)^2

9/4=(ab)^2/64

4(ab)^2=9×64

(Ab)^2=(9×64)/4

(Ab)^2=9×16

(Ab)^2=144

Ab=12 cm.....

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