# Slope to Angle Measure Calculator (I)

- Author:
- Tim Brzezinski

- Topic:
- Angles, Congruence, Geometry

**Students: This applet is to be used when trying to use coordinate geometry prove two triangles (drawn in the coordinate plane) congruent.**

*You already know how to calculate the distance between any two points in the coordinate plane, so finding the length of any side of a triangle should be an easy task. However, calculating the measure of an interior angle between two sides of a triangle is a bit more complicated.*

**If you need to calculate the angle measure between any two sides of a triangle, follow the directions in the applet below:**