Find the area of a rhombus one side of which measures 20 cm and one diagonal is 24 cm? Choose the correct choice: A) 320cm2 B) 280cm2 C) 384cm2 D) 290cm2 E) 350cm2
Let other diagonal = 2x cm.   Since diagonals of a rhombus bisect each other at right angles, we have:   (20)2 = (12)2 + (x)2 =&gt;x =√(20)2 – (12)2= √256= 16 cm.   So, other diagonal = 32 cm.   Area of rhombus = (1/2) x (Product of diagonals) =(1/2× 24 x 32) cm2 = 384 cm2   hence 384cm2
<result>C</result>
Find the area of a rhombus one side of which measures 20 cm and one diagonal is 24 cm?