Circles

Front

What is a radius in a circle?

Back

A radius is a line segment that connects the center of the circle to any point on the circle.

Front

What is a major arc?

Back

A major arc is an arc that is larger than a semicircle, covering more than half of the circle.

Front

What is the radius of the circle in the equation (x+2)²+(y-3)²=4?

Back

The radius is 2.

Front

What is a tangent line?

Back

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

Front

What is a central angle?

Back

A central angle is an angle whose vertex is at the center of the circle.

Front

What is a chord in a circle?

Back

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

Front

What is a semicircle?

Back

A semicircle is half of a circle, formed by a diameter and the arc connecting its endpoints.

Front

What is the difference between a major arc and a minor arc?

Back

A major arc is larger than a semicircle, while a minor arc is smaller than a semicircle.

Front

What is the formula for the circumference of a circle?

Back

The circumference C is given by C = 2πr, where r is the radius.

Front

What is the area of a circle?

Back

The area A is given by A = πr², where r is the radius.