The perimeter of a rectangle is 42 cm. One side is 9 cm longer than the other side. Find the lengths of the sides.

ANSWERS

2015-11-07 00:08:45

P=2(L+W) P=42 42=2(L+W) 21=L+W one side is 9 longer than other L=9+W subsitute 21=L+W 21=9+W+W 21=9+2W minus 9 both sides 12=2W divide by 2 both sides 6=W sub back L=9+W L=9+6 L=15 the sides are lenght 15cm and 6cm

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