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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 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?
200

What is an exterior angle?


This angle has a measure that is half the difference of its intercepted arcs.

200

What are interior angles?

The vertical angles made by intersecting chords in a circle.

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

What is an inscribed angle?

This is formed when two chords intersect at the same point on a circle.

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
The distance along the curved line making up the arc
What is the arc length?
300

formula to find arc length?

What is measure of AB ----------------- (CIRCUMFERENCE) 360 degrees

400

What is equal or the same as?

The measure of a central angle is ________________ the measure of its intercepted arc.

400

What is a tangent?

This is a line which intersects the circle in exactly one point.

400

What is 320?

The measure of the major arc if the minor arc's measure is 40 degrees

400
The point of intersection between a circle and its tangent line or line segment
What is the point of tangency?
400
Type of triangle that has 2 sides congruent
what is an isosceles triangle?
500

What is 61 degrees?

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 ______________.

500
If the diameter is 42 cm, then the radius is _______.
What is 21?
500

What is 90 degrees?

The measure of the angle formed by a radius and its tangent line.

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

The distance formula is derived from this theorem.

c2=a2+b2

What is the Pythagorean Theorem.