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- 1. Circle Geometry<br />By: Cameron Starcheski, Melanie Bender, and Sarah Somerville<br />
- 2. Terminology<br /><ul><li>A ‘chord’ divides a circle into two arcs</li></ul>Major (larger)<br />Minor (smaller)<br /><ul><li>If the word ‘arc’ appears by itself, it means the minor arc
- 3. An inscribed angle has its vertex on the circle and two chords from the arms
- 4. The word ‘subtended’ is used when a third chord completes the triangle
- 5. A ‘central angle’ has its vertex in the centre of the circle and its arms equal the radius</li></li></ul><li>Circle Theorem 1:<br />Perpendicular bisector of a chord passes through the center of the circle. <br />
- 6. Circle Theorem 2: <br />If two chords are congruent they are equidistant from the centre. <br />
- 7. Circle Theorem 3:<br />Measure of the central angle subtended by a chord is equal to twice the angle at the circumference. <br />
- 8. Circle Theorem 4: <br />Angle subtended by same arc are equal. <br />
- 9. Circle Theorem 5: <br />The angle subtended by a diameter is a right angle. <br />
- 10. Cyclic Quadrilateral:<br />Opposite angles in a cyclic quadrilateral add to 180 degrees<br />
- 11. Thanks for watching Kenton!!<br />

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