Parts of a Circle (12/2/2021)

Front

What is a secant in relation to a circle?

Back

A secant is a line that intersects a circle at two points.

Front

Define a central angle.

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides are radii that extend to the circle.

Front

What is the center of a circle?

Back

The center of a circle is the point that is equidistant from all points on the circle.

Front

What is the diameter of a circle?

Back

The diameter is a line segment that passes through the center of the circle and has its endpoints on the circle. It is twice the length of the radius.

Front

What is a tangent in relation to a circle?

Back

A tangent is a line that touches the circle at exactly one point.

Front

What is an inscribed angle?

Back

An inscribed angle is an angle formed by two chords in a circle which have a common endpoint.

Front

What is the relationship between a central angle and an inscribed angle that subtends the same arc?

Back

The central angle is twice the measure of the inscribed angle.

Front

What is the formula for the circumference of a circle?

Back

Front

What is the formula for the area of a circle?

Back

Front

What is a chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.