Find the area of Rhombus one of whose diagonals measures 8 cm and the other 10 cm ?



Find the area of Rhombus one of whose diagonals measures 8 cm and the other 10 cm ?

A. 47 cm2

B. 34 cm2

C. 40 cm2

D. 64 cm2

Answer : C. 40 cm2


Explanation 1:


    Area of triangle formula = 1/2*(base)*(height)
    Area of one triangle = 1/2 * (4) * (5)
    = 10 cm2.

    Total area of rhombus = 4 * area of one triangle
    = 4 * 10
    = 40 cm2

Explanation 2:


    Area of a rhombus is = 1/2 * (length of one diagonal) * (length of another diagonal)
    = 1/2 * 8 * 10 cm2
    = 40 cm2


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