Circles Test (Mod) 2024

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.

Front

What is the relationship between diameter and radius?

Back

Diameter = 2 × Radius.

Front

If the area of a circle is 25π in², what is the radius?

Back

Radius = 5 in.

Front

What is the equation of a circle with center (h, k) and radius r?

Back

(x - h)² + (y - k)² = r².

Front

What is the diameter of a circle with a radius of 6 in?

Back

Diameter = 12 in.

Front

How do you find the circumference of a circle?

Back

Circumference = 2πr.

Front

What is the center of a circle?

Back

The center is the point that is equidistant from all points on the circle.

Front

What does it mean for a line segment to be a radius?

Back

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

Front

If the diameter of a circle is 10 in, what is the area?

Back

Area = π(5)² = 25π in².

Front

What is the value of π (pi)?

Back

π is approximately 3.14.