Question

The lengths in inches of the sides of an isosceles triangle are shown below. What is the value of x, the length in inches of the base of the triangle?

55
24
12
8

Answer 1

@SolomonZelman

Answer 2

is it 8

Answer 3

You know that the 2 sides of the triangle, the left side and the right side, are equal becuase the triangle is isosceles.

\[2x-4=20\]\[2x-4\color{blue} { +4 } =20\color{blue} {+4 } \]\[2x=24\]\[x=?\]

Answer 4

(No, not 8.)

Answer 5

24

Answer 6

You didn't mean to say 24, did you?!

Answer 7

I mint 12

Answer 8

Good, and Correct. x=12.