Unit 10 - Vocabulary

What is the distance around a circle called?

• Circumference

• Diameter

• Radius

• Chord

Which term describes a circle about a polygon if it contains all the vertices of the polygon?

• Circumscribed

• Inscribed

• Tangent

• Central Angle

What is a polygon called if each of its vertices lies on a circle?

• Inscribed

• Circumscribed

• Tangent

• Chord

What is the point of intersection of a circle and a line that intersects the circle exactly once called?

• Point of Tangency

• Center of Circle

• Chord

• Secant

What is an angle that intersects a circle in two points and has a vertex at the center of the circle called?

• Central Angle

• Inscribed Angle

• Tangent Angle

• Secant Angle

What is the irrational number represented by the ratio of the circumference of a circle to the diameter of the circle?

• Pi

• Radian

• Diameter

• Chord

What do you call a circle of radius one unit whose center is at the origin?

• Unit Circle

• Major Arc

• Semicircle

• Tangent Circle

What is the measure of a central angle whose sides intercept an arc that is the same length as the radius of the circle?

• Radian

• Degree

• Pi

• Arc

What is the locus of all points in a plane equidistant from a given point called?

• Circle

• Chord

• Tangent

• Arc

What is a chord that passes through the center of a circle called?

• Diameter

• Radius

• Secant

• Tangent