CIRCLES
1. BASIC CONCEPTS
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A. CIRCLES, CHORDS AND ARCS
1. The Circle and Its Elements
2. Major and Minor Arcs
3. Arcs and Central Angles
4. Arc Length and the Circumference of a Circle 5
The History of Pi (π)
5. Chords and Arcs
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B. TANGENTS
1. Secants and Tangents
2. The Relative Position of Two Circles
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2. ANGLES AND CIRCLES
A. INSCRIBED ANGLES AND ARCS
Angle of Danger
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B. ANGLES FORMED BY SECANTS, TANGENTS AND CHORDS
1. Angles on a Circle
2. Angles Inside a Circle
3. Angles Outside a Circle
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C. CYCLIC QUADRILATERALS
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3. SEGMENTS AND CIRCLES
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A. SEGMENTS FORMED BY TANGENTS
1. Circumscribed Polygons
2. Common Tangents
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B. SEGMENTS FORMED BY SECANTS AND CHORDS
1. The Power of a Point
2. Segments Formed by Intersecting Secants
3. Segments Formed by Intersecting Chords
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C. PTOLEMY’S THEOREM