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in Mathematics by (106k points)

The perimeter of a rectangle whose one side measure 20 m and the diagonal is 29 m 

(a) 82 m (b) 78 cm (c) 98 m (d) 88 m

1 Answer

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Best answer

(a) In rectangle l2 + b2 = d2 

b2 = d2 – l2 = (29)2 –(20)2 

= 841 – 400 = 441 

b = 21 m 

Perimeter = 2(20 + 21) m = 82 m

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