Circumfrence Equuation

If my radius is 10ft, what is my diameter?

• 20ft
• 5ft
• 31.4ft
• 62.8ft

Tags

CCSS.7.G.B.4

If my diameter is 19 inches, what is my radius?

• 38 inches
• 9.5 inches
• 59.66 inches
• 119.32 inches

Tags

CCSS.7.G.B.4

To go from radius to diameter I need to do what?

• divide by 2
• multiply by 2
• multiply by 3.14
• divide by 3.14

Tags

CCSS.7.G.B.4

To go from diameter to radius, what do I need to do?

• divide by 3.14
• multiply by 3.14
• multiply by 2
• divide by 2

Tags

CCSS.4.MD.A.1

CCSS.4.MD.A.2

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

• C = r²

• C = rd

• A = π·r²

• C = π·d

Tags

CCSS.7.G.B.4

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

Tags

CCSS.7.G.B.4

What does C represent in the formula:

C = π·d

• Pi

• Circumference

• Diameter

• Area

Tags

CCSS.7.G.B.4

What does d represent in the formula:

C = π·d

• diameter

• radius

• pi

• 3.14

Tags

CCSS.7.G.B.4

What is the diameter of a circle?

• the distance around a circle

• the area of a circle

• halfway through a circle

• a line through the center of a circle

Tags

CCSS.HSG.C.A.2

What is the circumference of a circle?

• the distance around a circle

• the area of a circle

• halfway through a circle

• a line through the center of a circle

Tags

CCSS.HSG.C.B.5

CCSS.HSG.GMD.A.1