Intersecting Secants Investigation & Conjecture

Author:
Catherine A Eagen
Topic:
Angles
Investigate the relationship between the measures of the two intercepted arcs and angle C.
GeoGebra Applet
If arc DE measures 100 and arc FG measures 20, then angle C measures __?__ If arc DE measures 84 and angle C measures 16, then arc FG measures __?__

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