Area and Circumference of Circles

Front

What is the definition of the radius of a circle?

Back

The radius of a circle is the measurement from the center of the circle to any point on its edge.

Front

How do you calculate the radius if you are given the diameter?

Back

To calculate the radius from the diameter, divide the diameter by 2.

Tags

CCSS.7.G.B.4

Front

What is the formula for calculating the circumference of a circle?

Back

The circumference of a circle can be calculated using the formula C = 2πr, where r is the radius.

Tags

CCSS.7.G.B.4

Front

If the diameter of a circle is 60 meters, what is the circumference?

Back

The circumference is approximately 188.4 meters (C = πd, where d is the diameter).

Tags

CCSS.7.G.B.4

Front

What is the relationship between diameter and radius?

Back

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

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 10 ft?

Back

The circumference is approximately 62.83 ft (C = 2π(10)).

Tags

CCSS.7.G.B.4

Front

How many meters does Shaleah walk if she walks around a circular track with a diameter of 60 meters 4 times?

Back

Shaleah walks approximately 754 meters.

Tags

CCSS.7.G.B.4

Front

What is the formula for calculating the area of a circle?

Back

The area of a circle can be calculated using the formula A = πr², where r is the radius.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 5 cm, what is its area?

Back

The area is approximately 78.54 cm² (A = π(5)²).

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a diameter of 12 inches?

Back

The circumference is approximately 37.7 inches (C = πd).

Tags

CCSS.7.G.B.4