1. Unit 2 Day 5
Circle Vocabulary

2. In your groups look up the definitions for your vocabulary words
In your groups look up the definitions for your vocabulary words. Use technology. Hint, to find the correct definition add “of a circle” to the end. Ex: “Chord of a circle”

3. Circle
All points equidistant from a given point called the center

4. Semicircle
Half of a circle (Arc of a circle that measures 180⁰)

5. Radius A segment from the center to a point of the circle
*Note all radii of the same circle are congruent

6. Diameter
A special chord that passes through the center

7. Chord
A segment whose endpoints are on the circle

8. Secant
A line which intersects the circle in two points

9. Tangent
A line which intersects the circle in one and only one point

10. Arc A portion of the circumference of a circle
Major Arc- Arc that measures greater than 180˚
Minor Arc- Arc that measures less than 180˚

11. Sector
The interior formed by a central angle and its intercepted arc (“pie” shape)

12. Circle: Tangent: Chord: Major Arc: Radius: Minor Arc: Diameter:
Label one of each using the picture given:
Circle:
Tangent:
Chord:
Major Arc:
Radius:
Minor Arc:
Diameter:
Semicircle:
Secant: