Circumference, Radius and Diameter

A straight line from the center of a circle to the circumference is called the ____.

• Diameter

• Circumference

• Radius

• Area

Tags

CCSS.HSG.C.A.2

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

What is the diameter?

• 8

• 16

• 10

• 4

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

A circular garden has a circumference of 38.25 feet. Find the approximate diameter of the garden. Use 3.14 for Pi. Round to the nearest tenth

Tags

CCSS.Math.Content.7.G.B.4

If my diameter is 90cm, what is my circumference?

• 282.6cm

• 180 cm

• 90cm

• 565.2cm

Tags

CCSS.7.G.B.4

• A

• B

• C

• D

Tags

CCSS.7.G.B.4

Tags

CCSS.7.G.B.4

• 50.24 square feet

• 100.48 square feet

• 200.96 square feet

• 25.12 square feet

Tags

CCSS.7.G.B.4

What is the radius measurement? ​ (a)  

• 6 cm

• 12 cm 

• 24 cm

Tags

CCSS.7.G.B.4