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ANGLES
CIRCLE VOCAB
ARCS AND ANGLES
MORE CIRCLE VOCAB
RANDOM GEOMETRY TERMS
100
An angle which is made up of two radii whose vertex is the center of the circle.
What is the central angle?
100
The name of a segment whose endpoints are on a circle
What is a chord?
100

This is the measure of the central angle when the arc that it intercepts is 120 degrees.

What is 120 degrees?

100
An arc whose measure is less than 180 degrees
What is a minor arc?
100

An quadrilateral can only be inscribed in a circle if the opposite angles are __________?

What is supplementary?

200

This angle has its vertex on the circle.

What is an inscribed angle?

200
This is a line that intersects the circle at two points.
What is a secant?
200

Two chords that intersect inside a circle such that one chord is broken into a 3 inch part and a 8 inch part. The second chord has a 4 inch part and what for the other part?

What is 6 inches?

200
An arc which has a measure of exactly 180 degrees
What is a semi-circle?
200

Area formula and circumference formula for a circle

What is pi(radius)^2 and 2(pi)(radius) or pi(diameter)

300

The arc that is intercepted by an inscribed angle has a measure that is ________ the measure of the inscribed angle.

What is twice?

300
The special type of chord which passes through the center of the circle
What is diameter?
300
The measure of the intercepted arc if the inscribed angle measure is 53 degrees?
What is 106?
300

How many degrees does a minute hand on a clock move in 25 minutes?

What is 150 degrees (30 degrees every 5 minutes)

300

The standard equation for a circle with a center (-2,5) and radius of 4?

What is (x+2)2 + (y-5)2 = 16

400
The measure of a central angle is ________________ the measure of its intercepted arc.
What is equal or the same as?
400
This is a line which intersects the circle in exactly one point.
What is a tangent?
400
The measure of the major arc if the minor arc's measure is 40 degrees
What is 320?
400

Two or more circles that share the same center are called?

What are concentric?

400

The center and radius of a circle with the equation

x2 + (y-3)2 = 49

what center (0,3) and r=7?

500
The measure of the intercepted arc of a circle is 122 degrees. The measure of any inscribed angle whose endpoints are on that arc is ______________.
What is 61 degrees?
500

The radius and tangent meet at what degree angle at the point of tangency.

What is 90 degrees?

500

The measure of a tangent segment that meets a secant segment with external length of 4 and whole length of 9?

What is 6?

500

If 2 tangent segments are drawn to a circle from an external point, then the segments are __________.

What is congruent?

500

The exact area of a sector when the radius is 6 and the central angle is 180 degrees.

What is 18pi units .