Circles

Front

What is the radius of a circle?

Back

The radius is the distance from the center of the circle to any point on its circumference.

Front

What is the diameter of a circle?

Back

The diameter is the distance across the circle through its center, equal to twice the radius.

Front

What is the circumference of a circle?

Back

The circumference is the total distance around the circle.

Front

How do you calculate the circumference of a circle?

Back

Circumference = 2 × π × radius or Circumference = π × diameter.

Front

What is the area of a circle?

Back

The area is the space contained within the circle, calculated as Area = π × radius².

Front

What is π (pi)?

Back

π is a mathematical constant approximately equal to 3.14159, representing the ratio of the circumference of a circle to its diameter.

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 tangent to a circle?

Back

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

Front

What is a secant line?

Back

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

Front

What is the relationship between radius and diameter?

Back

The diameter is twice the length of the radius.