Circles and Circumference

Which expression could be used to find the approximate circumference of the quilt piece?

• 2(pi)16
• 2(pi)8
• 2(8)
• 2(4)

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.6

What is the diameter?

• 8
• 16
• 10
• 4

Tags

CCSS.7.G.B.4

Which method could be used to find the radius of the circle formed by the pinwheel as it spins?

• Divide 9 inches by 2
• Divide 9 inches by pi
• multiply 9 inches by pi
• multiply 9 inches by 2

Tags

CCSS.5.MD.A.1

Which best approximates the circumference of the outer ring of this clip?

• 27cm
• 18cm
• 9cm
• 3cm

Tags

CCSS.5.MD.A.1

What is the circumference?

• 48
• 96
• 24
• 18

Tags

CCSS.7.G.B.4

What is the radius?

• 18
• 72
• 38
• 14

Tags

CCSS.7.G.B.4

What is the circumference?

• 36
• 18pi
• 108pi
• 36pi

Tags

CCSS.7.G.B.4

What is the radius?

• 28
• 15
• 26
• 13

What is the diameter?

• 6.5
• 15
• 26
• 78

The radius is....

• a line that crosses through the center and touches each edge 
• the center point of a circle 
• a line from the center point to the edge of the circle
• an element in science

Tags

CCSS.4.G.A.1