Radius and Diameter REVIEW

Front

What is the definition of Radius?

Back

A straight line from the center to the circumference of a circle.

Front

What is the definition of Diameter?

Back

A straight line passing from side to side through the center of a circle.

Front

What is the relationship between Radius and Diameter?

Back

The diameter is twice the length of the radius.

Front

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

Back

10 mm.

Front

What is a Chord in a circle?

Back

A straight line segment whose endpoints lie on the circle.

Front

What is a Tangent in relation to a circle?

Back

A line that touches the circle at exactly one point.

Front

What is a Secant in a circle?

Back

A line that intersects the circle at two points.

Front

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

Back

6 cm.

Front

What is the formula for the circumference of a circle?

Back

C = π × Diameter.

Front

What is the formula for the area of a circle?

Back

A = π × Radius².