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Examine3 whether the given triangle are congruent or not ab=de=4cmbc=df=8.1 cmac =ef=4.5cm |
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Answer» Answer: 100cm2 Step-by-step EXPLANATION: DE=4cm,BC=8cm and ar(△FDE)=25cm 2 [ Given ] ⇒ △ABC∼△FDE [ Given ] ⇒ ar(△FDE) ar(△ABC)
= (DE) 2
(BC) 2
[ By area of similar triangle THEOREM ] ⇒ 25 ar(△ABC)
= (4) 2
(8) 2
⇒ ar(△ABC)= 16 64
×25 ⇒ ar(△ABC)=4×25 ∴ ar(△ABC)=100cm 2 |
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