Question

An isosceles triangle has a base that is 3 times the length of its legs. The perimeter of the triangle is 45 cm. What is the length of the base?

Answer 1

27cm

Explanation:

`s + s + s = p \\3x + x + x = 45 \\ 5x = 45 \\ (5x)/(5) = (45)/(5) \\ x = 9`

That's the length of one of its legs

The length of the base = 3x

= 3 x 9

= 45cm