A Rhombus has 17 cm side length and one of the diagonal length is 16cm. the area of the rhombus is... cm2 A. 180 B. 240 C. 280 D. 360

side length is 17 cm
the diagonal length is 16 cm
the diagonal other = 2 x [akar (17^2 -(1/2×16)^2)]
= 2 × [akar (17^2 - 8^2)]
= 2 × [akar (289 - 64)]
= 2 × [akar 225]
= 2 × 15
= 30 cm
The area of the rhombus is 1/2 x d1 × d2
= 1/2 × 16 × 30
= 240 cm^2 (B)