# Adjustable triangle: Find the Missing Angle

- Author:
- becca.grimley, adamgonza

## Find the missing angle

1. Adjust the size and shape of the triangle by moving points A, B, or C.
2. With B and C showing, calculate the measure of the missing angle
3. Click on "Show Angle A" to see if you are right.
Continue this process until you are certain you can find a missing angle.