What is a tangent to a circle?
Unit 10, Circles - Tangents & Angles (10.5-10.6)

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Mathematics
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A tangent is a line that touches a circle at exactly one point.
2.
FLASHCARD QUESTION
Front
What is the relationship between the angle formed by a tangent and a chord through the point of contact?
Back
The angle formed is equal to the measure of the arc opposite to the angle.
3.
FLASHCARD QUESTION
Front
What is the measure of an angle formed by two tangents drawn from a point outside the circle?
Back
The measure of the angle is half the difference of the measures of the intercepted arcs.
4.
FLASHCARD QUESTION
Front
If the measure of arc ABC = 210°, what is the measure of ∠AOC?
Back
150°
5.
FLASHCARD QUESTION
Front
What is the formula for the measure of an inscribed angle?
Back
The measure of an inscribed angle is half the measure of the intercepted arc.
6.
FLASHCARD QUESTION
Front
What is the measure of angle KLM if it is formed by a tangent and a chord?
Back
The measure of angle KLM is equal to half the measure of the arc that the chord subtends.
7.
FLASHCARD QUESTION
Front
How do you find the measure of an arc given the central angle?
Back
The measure of the arc is equal to the measure of the central angle.
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