What is the definition of a central angle?
Review Activity: Arcs, Sectors, and Angles

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Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An angle in a circle with its vertex at the center of the circle.
2.
FLASHCARD QUESTION
Front
What is a radius in a circle?
Back
A line segment from the center of the circle to any point on the circle.
3.
FLASHCARD QUESTION
Front
Identify the segment that is not a radius: CA, CB, CD, LM.
Back
LM is not a radius.
4.
FLASHCARD QUESTION
Front
What is the formula to find the measure of an inscribed angle?
Back
The measure of an inscribed angle is half the measure of the intercepted arc.
5.
FLASHCARD QUESTION
Front
If the measure of an arc is 120°, what is the measure of the central angle that intercepts it?
Back
The measure of the central angle is also 120°.
6.
FLASHCARD QUESTION
Front
What is the relationship between the angles formed by two intersecting chords in a circle?
Back
The measure of each angle is half the sum of the measures of the arcs intercepted by the angle and its vertical angle.
7.
FLASHCARD QUESTION
Front
Solve for x: 2x + 10 = 50.
Back
x = 20.
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