Find the area of a rhombus whose side is 25 cm and one of the diagonals is 30 cm?
Choose one.
A) 656 sq.cm
B) 517 sq.cm
C) 657 sq.cm
D) 826 sq.cm
E) 600 sq.cm
Consider the rhombus ABCD. Let the diagonals intersect at E. Since diagonals bisect at right angles in a rhombus.   BE2 + AE2 = AB2   252 = 152 + AE2 AE = √(625 - 225)= 
<gadget id="calculator">(625 - 225)</gadget>
<output>400</output>
√400= 20,   AC = 20 + 20= 
<gadget id="calculator">20 + 20</gadget>
<output>40</output>
40 cm.   Area of a rhombus= 1/2 * d1d2   = 1/2 * 40 * 30= 
<gadget id="calculator">1/2 * 40 * 30</gadget>
<output>600</output>
600 sq.cm.   Answer: 600 sq.cm
<result>E</result>
Find the area of a rhombus whose side is 25 cm and one of the diagonals is 30 cm?