Question

What is ​ BC ​?Enter your answer in the box.

Answer 1

Line BC is 18........ like please

Answer 2

Answer:

18 units.

Step-by-step explanation:

We have been given a graph of a triangle and we are asked to find the length of side BC.

We can see from our triangle that measure of angle B is equal to measure of angle C, which means that our given triangle is an isosceles triangle.

Now we will find the value of x by equating the side corresponding to angle B and C to each other as:

$8x-4=5x+11$

$8x-4+4=5x+11+4$

$8x=5x+15$

$8x-5x=5x-5x+15$

$3x=15$

Let us divide both sides of our equation by 3.

$\frac{3x}{3}=\frac{15}{5}$

$x=5$

To find the length of side BC we will substitute $x=5$ in the expression given for side BC.

$BC=4x-2$

$BC=4*5-2$

$BC=20-2$

$BC=18$

Therefore, the length of side BC is 18 units.