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VII CLASS MATHEMATICS
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Area of the square ABCD = (Side)2
= (20)2 = 400 cm2
A of Triangle 1 =1/2*b*h=
1/2*10*10=50cm2
A of Triangle 2=
1/2*10*20=100cm2
A of Triangle 3=
1/2*10*20=100cm2
Area of the three triangles
= 50 cm2 + 100 cm2 + 100 cm2 = 250 cm2
Area of the shaded portion
= 400 cm2 – 250 cm2 = 150 cm2
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