Q. A rhombus has diagonals of length 8 cm and 6 cm. Find its perimeter.

Option
(1) 18 cm
(2) 20 cm
(3) 24 cm
(4) 28 cm

• a rhombus has all four sides of equal length &
  side=sqrt[(d1/2)^2+(d2/2)^2] where d1,d2 are diagonals
  so side=sqrt[(8/2)^2+(6/2)^2]=sqrt(25)=5 cm
  perimeter=4*side=4*5= 20 cm
  option(2)
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