Question

How do you find the measure of this angle ?

Answer 1

The lines through the sides in the circle indicate that the three sides are all of the same length, and therefore share the same angle.

A shape inside a circle will always have its angles equal 360, so you can find the individual angle with the following equation:


`120 + 3x = 360`

Subtract 120 from both sides.


`3x = 240`

Divide both sides by 3.


`x = 80`

mBC's angle is 80 degrees.