Properties of Circles

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 definition of a diameter?

Back

A diameter is a chord that passes through the center of the circle, dividing it into two equal halves.

Front

What is a radius?

Back

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

Front

What is a secant?

Back

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

Front

What is a tangent?

Back

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

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.

Front

If the radius of a circle is 5 cm, what is the diameter?

Back

Diameter = 2 * radius = 10 cm.

Front

If the diameter of a circle is 12 cm, what is the radius?

Back

Radius = diameter / 2 = 6 cm.

Front

What is the relationship between the radius and the diameter?

Back

The diameter is twice the length of the radius.