Open Up Resources Unit 3 Test Review

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where C is the circumference and r is the radius.

Tags

CCSS.7.G.B.4

Front

How do you calculate the radius of a circle if you know the diameter?

Back

The radius is half of the diameter. r = d/2.

Tags

CCSS.7.G.B.4

Front

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

Back

The circumference is π times the diameter. C = πd.

Tags

CCSS.7.G.B.4

Front

What is the formula for the area of a circle?

Back

A = πr², where A is the area and r is the radius.

Tags

CCSS.7.G.B.4

Front

If the radius of a circle is 9 meters, what is its circumference?

Back

The circumference is approximately 56.52 meters.

Tags

CCSS.7.G.B.4

Front

What is the area of a circle with a radius of 4.5 feet?

Back

The area is approximately 63.585 ft².

Tags

CCSS.7.G.B.4

Front

What does π represent in circle formulas?

Back

π (pi) is a mathematical constant approximately equal to 3.14159.

Tags

CCSS.HSG.GMD.A.1

Front

How do you convert from diameter to radius?

Back

Divide the diameter by 2.

Tags

CCSS.7.G.B.4

Front

What is the circumference of a circle with a diameter of 10 mm?

Back

The circumference is approximately 31.4 mm.

Tags

CCSS.7.G.B.4

Front

What is the significance of the formula πr²?

Back

It is used to calculate the area of a circle.

Tags

CCSS.7.G.B.4