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elena-s [515]
3 years ago
5

Triangle ABC is isosceles. What is the length of segment BC?

Mathematics
2 answers:
zepelin [54]3 years ago
8 0
Became the triangle is isosceles AB and BC are equal to each other. Meaning if we solve for x by creating an equation and then substitute x into the equation for BC we will get our answer l.

Alja [10]3 years ago
4 0
ANSWER

\bar{BC} = 40 \: units


EXPLANATION

The given triangle has side
AB=x+17
and

BC=2x-6


We were given that the triangle is an isosceles triangle.

This means that these two sides are equal.

We therefore form the equation below and solve for the value of x.



x + 17 = 2x - 6
We group like terms to get,


x - 2x =  - 6 - 17


This implies that,

- x =  - 23



x = 23


We substitute this value into the expression for side BC to get ,

BC=2(23)-6


BC=46-6

BC=40

The correct answer is C.
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