# Angles in Opposite Segments

10.3 Angles in Opposite Segments
The sum of angles in opposite segments of a circle is 180 degrees.
(angles in opp. segments)

1. Click and drag points B and E.
What do you notice about the size of the marked angles when they are in opposite segments?
What do you notice about the size of the marked angles when they are in the same segment?
2. Click and drag points C and D.
What do you notice about the size of the marked angles?
How are the angles related?

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