Circles Arcs, Angles, Segment Lengths

Front

What is the formula to find segment lengths in a circle set up with two secants?

Back

The formula is: (Segment 1) * (External Segment 1) = (Segment 2) * (External Segment 2).

Front

What formula would you use to find the measure of an angle formed by two secants?

Back

The formula is: Angle = 1/2 (Arc 1 + Arc 2).

Front

What formula would you use to find the measure of an angle formed by a tangent and a secant?

Back

The formula is: Angle = 1/2 (Arc 1 - Arc 2).

Front

The formula to find the measure of Angle A formed by two tangents is...

Back

Angle A = 1/2 (Arc 1 - Arc 2).

Front

What formula do you use for finding segment lengths when they intersect inside the circle?

Back

The formula is: (Segment 1) * (Segment 2) = (Segment 3) * (Segment 4).

Front

Define a secant in relation to a circle.

Back

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

Front

What is a tangent in relation to a circle?

Back

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

Front

Explain the relationship between the angles formed by two intersecting chords inside a circle.

Back

The measure of the angle is equal to half the sum of the measures of the arcs intercepted by the angle and its vertical angle.

Front

What is the relationship between the angles formed by two tangents drawn from a point outside the circle?

Back

The angle formed is equal to half the difference of the measures of the intercepted arcs.

Front

What is the formula for the length of a tangent segment from a point outside the circle?

Back

The formula is: Length of Tangent = √(External Segment)² - (Radius)².