Area and Circumference

What number is pi?

• 1.41

• 2.00

• 3.14

• 5.14

Tags

CCSS.HSG.GMD.A.1

Another use for pi?

• circumference of a circle

• desert after dinner

• triangle bisect line

• square root

Tags

CCSS.7.G.B.4

Pi = c ​​ (a)   ​ d

Tags

CCSS.7.G.B.4

Pi is an ​ (a)   number.

• irrational
• rational
• natural
• whole

Tags

CCSS.HSG.GMD.A.1

What fraction represents Pi?

• 22/7

• 1/2

• 3/4

• 30/8

Tags

CCSS.HSG.GMD.A.1

What numbers represent pi?

• 3.152478

• 3.1459126

• 3.6589754

• 8.2145789

Tags

CCSS.HSG.GMD.A.1

Ethan measured a circular lid and found d, the diameter, was 8 inches and C, the circumference, was 25 inches. Which expression represents an approximate value for pi?

Tags

CCSS.7.G.B.4

Does this picture show the diameter or radius of a circle?

• Diameter
• Radius

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 is the circumference of this circle?  Round to the nearest tenth.

• 3.14 cm 
• 37.7 cm
• 24 cm
• 68.4 cm

Tags

CCSS.7.G.B.4