JV Circles Review

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is the measure of arc AB if it is given as 100 degrees?

Back

The measure of arc AB is 100 degrees.

Front

How do you find the measure of an angle formed by two chords?

Back

The measure of the angle is half the sum of the measures of the arcs intercepted by the angle.

Front

What is the relationship between the angles formed by intersecting chords?

Back

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

Front

What is the measure of angle 2 if it is given as 40 degrees?

Back

The measure of angle 2 is 40 degrees.

Front

How do you calculate the length of a chord given the radius and the angle subtended at the center?

Back

Length of chord = 2 * radius * sin(angle/2).

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 * π * radius.

Front

What is the definition of a secant line?

Back

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

Front

What is the difference between a tangent and a secant?

Back

A tangent touches the circle at exactly one point, while a secant intersects it at two points.

Front

How do you find the area of a sector of a circle?

Back

Area of sector = (angle/360) * π * radius^2.