Find the area of a rhombus whose side is 25 cm and one of the diagonals is 30 cm?  Select
A) 225 sq.m B) 360 sq.m C) 720 sq.m D) 480 sq.m E) None of these
Explanation:   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 = âˆš(625 - 225)= 
<gadget id="calculator">(625 - 225)</gadget>
<output>400</output>
âˆš400= 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.   ANSWNone of theseR IS None of these
<result>E</result>
Find the area of a rhombus whose side is 25 cm and one of the diagonals is 30 cm?