Posted by **Allison** on Monday, September 10, 2012 at 12:32pm.

Which equation could be used to find the perimeter of an isosceles triangle, with two sides 13 cm long, a base 10 cm long and a height of 12 cm?

A.

P = (10 × 12) ÷ 2

B.

P = 2 × 13 + 10

C.

P = 13 + 10 + 12

D.

P = 2 × 10 + 13

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