Circle Angles Review

Front

What is the definition of a circle angle?

Back

A circle angle is formed by two radii of a circle that meet at the center, creating an angle that measures the amount of rotation from one radius to the other.

Front

What is the relationship between the central angle and the inscribed angle in a circle?

Back

The inscribed angle is half the measure of the central angle that subtends the same arc.

Front

How do you calculate the measure of a central angle in a circle?

Back

The measure of a central angle can be calculated by dividing the arc length by the radius of the circle.

Front

What is the formula for the circumference of a circle?

Back

The circumference of a circle is calculated using the formula C = 2πr, where r is the radius.

Front

What is the measure of a full circle in degrees?

Back

A full circle measures 360 degrees.

Front

What is the relationship between the angles formed by two intersecting chords in a circle?

Back

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

Front

What is the definition of a tangent to a circle?

Back

A tangent to a circle is a line that touches the circle at exactly one point and is perpendicular to the radius at that point.

Front

What is the angle formed between a tangent and a radius drawn to the point of tangency?

Back

The angle formed between a tangent and a radius drawn to the point of tangency is always 90 degrees.

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula A = πr², where r is the radius.

Front

What is the definition of a sector in a circle?

Back

A sector is a region of a circle bounded by two radii and the arc between them.