# Angles formed by secant lines

- Author:
- Jordan Varney

The measure of arcs CE and DF are shown. Angle DGF is formed by two secant lines CD and EF. Drag any of the points on the edge of the circle to make a conjecture about the relationship between the angle measure and the measure of the two arcs. (HINT: You may need to make a chart to record to of the angle measures to recognize a pattern)