Question

PLEASE HELP!!! I NEED ANSWER IMMEDIATELY!!!
What is the length of side AC of the triangle?

Answer 1

`AC=25\ units`

Explanation:

we know that

An isosceles triangle has two equal sides and two equal interior angles

In this problem

The triangle ABC is an isosceles triangle, because

m∠A=m∠C

therefore

AB=BC

substitute the given values

`5x+5=7x-1`

solve for x

`7x-5x=5+1`

`2x=6`

`x=3`

Find the length of side AC

`AC=6x+7`

substitute the value of x

`AC=6(3)+7`

`AC=25\ units`