Circumference and 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 the circle.

Front

What is the relationship between a radius and a diameter?

Back

The diameter is twice the length of the radius.

Tags

CCSS.7.G.B.4

Front

How can you identify a radius in a diagram of a circle?

Back

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

Front

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

Back

The circumference (C) 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 10 cm, what is the radius?

Back

The radius is 5 cm, since the radius is half of the diameter.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a radius of 7 cm?

Back

The circumference is approximately 43.98 cm, calculated using C = 2π(7).

Tags

CCSS.7.G.B.4

Front

What segment represents the diameter in a circle?

Back

The diameter is the longest chord of the circle, passing through the center and connecting two points on the circle.

Tags

CCSS.HSG.C.A.2

Front

If a circle has a circumference of 31.4 cm, what is its radius?

Back

The radius is approximately 5 cm, calculated using the formula r = C/(2π).

Tags

CCSS.7.G.B.4

Front

What is the difference between a chord and a diameter?

Back

A chord is any line segment with both endpoints on the circle, while a diameter is a specific chord that passes through the center.

Front

How do you calculate the diameter if you know the radius?

Back

The diameter can be calculated by doubling the radius: Diameter = 2 * Radius.

Tags

CCSS.7.G.B.4