math vocab

Center

• Point A – The exact middle of the circle.

2. Chord

• CB – A line segment connecting two points on the circle without passing through the center.

3. Diameter

• FG – A chord that passes through the center, the longest possible chord.

4. Radius

• AI – A line segment from the center to a point on the circle.

5. Major Arc

• KJ – An arc that measures more than 180°.

6. Minor Arc

• IJ – An arc that measures less than 180°.

7. Semicircle

• KRJ – An arc that measures exactly 180° (half the circle).

8. Tangent Line

• PK – A line that touches the circle at exactly one point.

9. Secant Line

• GI – A line that intersects the circle at two points.

10. Point of Tangency

• Point K – The point where the tangent line meets the circle.

11. Inscribed Angle

• ∠IAK – An angle formed by two chords meeting at a point on the circle.

12. Central Angle

• ∠IBC – An angle with its vertex at the center of the circle.