Question

be fast .
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step wise explanation​

Answer 1

Answer:

(i) 50cm

(ii) 500cm^2

(iii) 800cm^2

Step-by-step explanation:

We know that Ar(a triangle) = 1/2bh

On applying it here, we get,

Ar ( DEF ) = 1/2 × EF × DH

{ b = EF; h = DH }

300 = 1/2 × EF × 12

{ given }

300 = 6 × EF

EF = 300/6 = 50 cm ----(i)

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Ar ( GEF ) = 1/2 × EF × GK

{ b = EF = 50; h = GK = 20 }

==> Ar ( GEF ) = 1/2 × 50 × 20

= 500 cm^2 ----(ii)

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Ar (DEGF) = Ar ( DEF ) + Ar ( GEF )

= 300 + 500

= 800cm^2.----(iii)

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Hope it helps.......!

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