Circumference and Area of a Circle

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

• C = 2 * Pi * r

• C = 2 * Pi * d

• C = Pi * d

• C = Pi * r

Tags

CCSS.7.G.B.4

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

• A = Pi * r

• A = 2 * Pi * r

• A = Pi * d

• A = Pi * r^2

Tags

CCSS.7.G.B.4

What does it mean to 'square' the radius in the area formula?

• Add it to itself

• Divide it by 2

• Multiply it by itself

• Multiply it by 2

Tags

CCSS.7.G.B.4

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

• Diameter = 2 * radius

• Diameter = radius / 2

• Diameter = radius + 2

• Diameter = 2 + radius

Tags

CCSS.7.G.B.4

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

• 15.7 meters

• 5 meters

• 31.4 meters

• 62.8 meters

Tags

CCSS.7.G.B.4

What is the area of a circle with a radius of 5 inches?

• 15.7 square inches

• 78.5 square inches

• 25 square inches

• 31.4 square inches

Tags

CCSS.7.G.B.4

What is the circumference of the earth at the equator?

• 30,000 km

• 20,000 km

• 40,000 km

• 50,000 km

Tags

CCSS.HSG.GMD.A.1

What is the area of a pizza with a diameter of 16 inches?

• 201.06 square inches

• 301.59 square inches

• 402.12 square inches

• 502.65 square inches

Tags

CCSS.7.G.B.4

What is the result of squaring the radius of a circle with a radius of 7 units?

• 21 units

• 14 units

• 56 units

• 49 units

Tags

CCSS.7.G.B.4

What is the result of doubling the radius of a circle with a radius of 9 units?

• 18 units

• 9 units

• 36 units

• 27 units

Tags

CCSS.7.G.B.4