Circles Review

Using the diagram, name a tangent line.

• Line DG

• Segment AC

• Segment DG

• Line DE

Using the diagram, name a radius.

• Line DG

• Segment AC

• Segment DG

• Line DE

Using the diagram, name a chord.

• Line DG

• Segment AC

• Segment DG

• Line DE

Using the diagram, name a secant.

• Line DG

• Segment AC

• Segment DG

• Line DE

Define circle.

• part of a circle measuring more than 180

• an angle whose vertex is the center of the circle

• the set of all points in a plane that are equidistant from a given point

• an angle whose vertex is on a circle and whose measure is half of its intercepted arc

Define central angle.

• part of a circle measuring more than 180

• an angle whose vertex is the center of the circle

• the set of all points in a plane that are equidistant from a given point

• an angle whose vertex is on a circle and whose measure is half of its intercepted arc

Define Major Arc.

• part of a circle measuring more than 180

• an angle whose vertex is the center of the circle

• the set of all points in a plane that are equidistant from a given point

• an angle whose vertex is on a circle and whose measure is half of its intercepted arc

Define Inscribed Angle

• part of a circle measuring more than 180

• an angle whose vertex is the center of the circle

• the set of all points in a plane that are equidistant from a given point

• an angle whose vertex is on a circle and whose measure is half of its intercepted arc

Define Semi-circle

• part of a circle measuring less than 180°

• an arc whose measure is 180

• the length of a line segment from the center of a circle to the edge

• a straight line segment whose endpoints both lie on the circle

Define radius

• part of a circle measuring less than 180°

• an arc whose measure is 180

• the length of a line segment from the center of a circle to the edge

• a straight line segment whose endpoints both lie on the circle