Isosceles triangle 17

One of the equal sides of an isosceles triangle is 13 cm and its perimeter is 50 cm. Find the area of the triangle.

Correct answer:

A =  60 cm2

Step-by-step explanation:

b=13 cm p=50 cm  p = 2b + a  a=p2 b=502 13=24 cm  b2 = (a/2)2+h2  h=b2(a/2)2=132(24/2)2=5 cm  A=2a h=224 5=60 cm2



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