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 has the same measure of the central angle.
What is intercepted arc?
100
An arc whose measure is less than 180 degrees
What is a minor arc?
100
An angle that is more than 90 degrees
What is an obtuse angle?
200
This is formed when two chords intersect at the same point on a circle.
What is an inscribed angle?
200
The special type of chord which passes through the center of the circle
What is diameter?
200
The measure of the intercepted arc if the inscribed angle measure is 53 degrees?
What is 106?
200
An arc which has a measure of exactly 180 degrees
What is a semi-circle?
200
A shape that has equal side lengths and angles. 

What is congruent.

300
The measure of a central angle is ________________ the measure of its intercepted arc.
What is equal or the same as?
300
If the diameter is 42 cm, then the radius is _______.
What is 21?
300
The measure of the major arc if the minor arc's measure is 40 degrees
What is 320?
300
The distance along the curved line making up the arc
What is the arc length?
300

A shape that has proportional side and equal angle measures. 

What is similar. 

400

An angle at the center of a circle with end points on the circles circumference.

What is a central angle.

400

What is the difference between the circumference of a circle and the total number of degrees or radians?

What is a circumference is a measurement of length whereas degrees and radians are an angle measure.  

400

Formula for arc length in radians.

What is sector (or arc length)=radius*theta

400
The point of intersection between a circle and its tangent line or line segment
What is the point of tangency?
400
Area formula and circumference formula for a circle
What is pi(radius)^2 and 2(pi)(radius) or pi(diameter)
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
What is the total measure of a circle in degrees and radians?

What is 360 degrees and two pi radians. 

500

Circle R has chords (TK) and (CB) that intersect at point G. Find the value of x, given the measure of arc TB=80°, the measure of arc CK=(17x+10)°, and m∠CGK=130°.

What is x=10

500
If 2 tangent segments are drawn to a circle from an external point, then the segments are congruent.
What is the two tangent theorem?
500

Formula (proportion) to find arc length (in degrees)

ARC/circumference=Angle measure/360

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