Goal: Determine the measure of angles whose vertics are at the center of the circle.
New knowledge:
Circles
The center is the point that is the same distance from all points on the circle.
A radius is any segmnet that has one endpoint at the center of the circle and the other endpoint on the circle.
A chord is any segment with both endpoints on the circle.
A diameter is any chord through the center or the length of that segment.
A central angle is any angle with its vertex at eh center of the circle and sides that intersect the circle.
Apply: p.399 (1-11) question 12. Define: a) Supplementary angles b) Vertical angles
Homework: Study the material given in class today for a quiz tomorrow.
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