Area of a Circle

Front

What is the definition of a diameter in a circle?

Back

A diameter is a line segment that passes through the center of the circle and whose endpoints lie on the edge/circumference of the circle.

Front

What is the definition of a radius in a circle?

Back

A radius is a line segment drawn from the center of a circle to the edge/circumference of the circle.

Front

What is the formula for the area of a circle?

Back

The formula for the area of a circle is A = πr².

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5, what is the area? (Use 3.14 for π)

Back

The area is 78.5.

Tags

CCSS.7.G.B.4

Front

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

Back

The diameter is twice the length of the radius (d = 2r).

Tags

CCSS.7.G.B.4

Front

How do you calculate the circumference of a circle?

Back

The circumference can be calculated using the formula C = 2πr.

Tags

CCSS.7.G.B.4

Front

What is the value of π (pi) commonly approximated as?

Back

π is commonly approximated as 3.14.

Tags

CCSS.HSG.GMD.A.1

Front

If the area of a circle is 50.24, what is the radius? (Use 3.14 for π)

Back

The radius is approximately 4.

Tags

CCSS.7.G.B.4

Front

What is the significance of the area of a circle in real-world applications?

Back

The area of a circle is significant in various applications such as calculating the space within circular objects, designing circular structures, and understanding circular motion.

Tags

CCSS.7.G.B.4

Front

What happens to the area of a circle if the radius is doubled?

Back

If the radius is doubled, the area increases by a factor of four (A = π(2r)² = 4πr²).

Tags

CCSS.7.G.B.4