Find an area of the rectangle, which has a diagonal of 17 cm and one side 15 cm.
Option:
A. 120 Sq. cm
B. 136 Sq. cm
C. 255 Sq. cm
D. 289 Sq. cm
Answer: A . 120 Sq. cm
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Justification:
The unknown side of the diagonal x = sq.root of ((17)^2 - (15)^2) = sq. root of (289-225) = sq. root of (64) = 8.
The area of the rectangle = side 1 of the rectange * side 2 of the rectangle = 15 * 8 = 20 Sq. cm.
