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Lesson 92  Introduction to Circles
Today, we defined a whole bunch of things related to circles. We started by recalling the formulas for area and circumference of circles:
We then defined a chord:
We then moved to a diameter:
We also discussed inscribed angles and arcs:
We then talked about the measure of inscribed angles. Remember...it's always half of the measure of the arc it intercepts:
And wrapped up by discussing sectors and how to find their areas:
This was an example of calculating the area of a given sector:
