PARTS OF A CIRCLE

Front

What is the definition of a radius in a circle?

Back

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

Front

What is the definition of a diameter in a circle?

Back

A diameter is a line segment that passes through the center of the circle and has its endpoints on the circumference.

Front

What is the definition of a chord in a circle?

Back

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

Front

What is the definition of a circumference?

Back

The circumference is the distance around the circle.

Front

What is the definition of a tangent in relation to a circle?

Back

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

Front

What is the point of tangency?

Back

The point of tangency is the point where a tangent touches the circle.

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the relationship between the radius and diameter?

Back

The diameter is twice the length of the radius (d = 2r).

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 7 cm, what is the diameter?

Back

Diameter = 2 * 7 cm = 14 cm.