Mathematics: What is bc ? enter your answer in the box.

What is bc ? enter your answer in the box.

kamorex

13.01.2022

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.

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