Find missing angle !.

Step-by-step explanation:

We can use a couple of angle relationships to find the missing angle.

1. All angles in a triangle add up to 180°

We know that all angle in a triangle will add up to 180°. Since we know the measure of 2, we can find the other angle easily.

So the other angle in the triangle is 50°.

2. The 50° angle and the missing angle are supplementary.

We know that the missing angle and the third triangle angle are supplementary. This means that their angle measures will add up to 180°.

Since we know one, we can find the measure of the other.

So the missing angle is 130°.

Hope this helped!

/

step-by-step explanation: