Circle properties and theorems flashcards

Question 1

What is the radius of a circle?

Accepted Answer

A line segment from the center of the circle to any point on the circle; its length is $r$.

Question 2

What is a central angle?

Accepted Answer

An angle whose vertex is at the center of the circle; it intercepts an arc of the circle.

Question 3

What tangent property relates a tangent and a radius at the point of tangency?

Accepted Answer

A tangent line is perpendicular to the radius drawn to the point of tangency.

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