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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?
100
An angle that is more than 90 degrees
What is an obtuse angle?
200
This angle has a measure that is half the difference of its intercepted arcs.
What is an exterior angle?
200
This is a line that intersects the circle at two points.
What is a secant?
200
The vertical angles made by intersecting chords in a circle.
What are interior angles?
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
This is formed when two chords intersect at the same point on a circle.
What is an inscribed angle?
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 arc measure/360 = arc length/circumference
400
The measure of a central angle is ________________ the measure of its intercepted arc.
What is equal, congruent, 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
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
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
If the diameter is 42 cm, then the radius is _______.
What is 21?
500
The measure of the angle formed by a radius and its tangent line.
What is 90 degrees?
500

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

the segments are congruent

500
What is used to find a missing side length of a right triangle?
What is the Pythagorean Theorem.