Question

Find the area of rhombus having each equal side to 26cm and one of the whose diagonal is 20 cm

Answer 1

diagonals divides rhombus into four triangles
in that triangle diagonal of length 20cm is bisected with other diagonal of unknown length and it is 10cm
so area of that triangle is 1/2x26x10=130cmsquare
area of four triangles is area of rhombus
so 4x130=520 cm square is the area of rhombus

Answer 2

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