Parts of Circles

Front

What is the definition of a radius in a circle?

Back

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

Front

What is the definition of a diameter in a circle?

Back

The diameter is a straight line that passes through the center of the circle and connects two points on its circumference. It is twice the length of the radius.

Front

What is a chord in a circle?

Back

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

Front

What is a tangent in relation to a circle?

Back

A tangent is a line that touches the circle at exactly one point, known as the point of tangency.

Front

What is the relationship between the diameter and radius of a circle?

Back

The diameter is twice the length of the radius (Diameter = 2 x Radius).

Front

If a circle has a radius of 5 m, what is its diameter?

Back

10 m.

Front

What is a secant in relation to a circle?

Back

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

Front

What is a sector of a circle?

Back

A sector is a region enclosed by two radii and the arc between them.

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2 x π x Radius.

Front

What is the formula for the area of a circle?

Back

Area = π x (Radius)^2.