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प्रश्न
The diagonal of a rectangle is 34 cm. If its breadth is 16 cm; find its :
(i) length
(ii) area
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उत्तर
AC2 = AB2+BC2 (By Pythagoras theorem)
(34)2 = l2 + (16)2
1156 = l2 + 256
l2 = 1156 – 256
l2 = 900
l = `sqrt(900)` = 30 cm
area = l x b = 30 x 16 = 480 cm2
(i) 30 cm (ii) 480 cm2
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