MSSE 370 Circle Flashcard

Front

What is the formula for the area of a circle?

Back

A = πr²

Front

If a circle has a radius of 7 cm, what is the diameter?

Back

14 cm

Front

How do you calculate the circumference of a circle if you know the diameter?

Back

C = πd

Front

What is a chord in a circle?

Back

A line segment with both endpoints on the circle

Front

What is the diameter of a circle?

Back

A line segment passing through the center with endpoints on the circle

Front

What is the formula for the circumference of a circle?

Back

C = 2πr or C = πd

Front

What is the radius of a circle?

Back

A line segment joining the center to a point on the circle

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius

Front

What is the definition of a circle?

Back

A set of points in a plane that are equidistant from a given point called the center.

Front

What is the area of a circle with a radius of 5 cm?

Back

A = π(5)² = 25π cm²