3 years ago

The area and perimeter of parallelogram

1 answer:

6 0

Triangles ADE and CDF are similar, so:-
10/12 = 15/CD
CD = (12*15) / 10 = 18 cm = AB = base of the parallelogram

Area of the parallelogram = base * height = 18 *10 = 180 cm^2 (answer)

(b) The perimeter:-
AD = CB = 15 (opposite sides are equal)

Perimeter = 2*18 + 2*15 = 36 + 30 = 66 cm (answer)

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