Question

if a(∆abc) = 9cm^2 a(∆def) = 6cm^2 de = 5.6 find ab if ∆abc = ∆def

Answer 1

Answer:

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Step-by-step explanation:

Step-by-step explanation:

Here,triangleABC ~ triangle DEF

Therefore,

BC/EF = AC/DF = AB/DE

Then,

ar(triangleABC)/ ar(triangleDEF) = 16/9

(BC/EF)^ = 16/9

(2.1/EF)^ =16/9

EF^=16×2.1^/9

EF=2.8cm