diameter and radius

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.7.G.B.4

What is the radius?

• 18
• 72
• 38
• 14

Tags

CCSS.7.G.B.4

A bicycle tire has a diameter of 27 inches. What is the radius?

• 27pi
• 13.5
• 81
• 25pi

Tags

CCSS.7.G.B.4

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

A line that goes from one end of the circle to the other and crosses the center point.  

• center
• diameter
• unknown

• radius

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

Tags

CCSS.7.G.B.4

What is the radius if the diameter is 27?

• 135
• 13.5
• 1.35
• I do not know

Tags

CCSS.7.G.B.4

Brian made a tasty burger. The diameter of the
burger was 5 cm. What is the radius of the circle?

• 15.7 cm
• 10 cm
• 2.5 cm
• 31.4 cm

Tags

CCSS.7.G.B.4

What is the diameter of a circle with a radius of 3 feet?

• 9.42 feet
• 18.84 feet
• 6 feet
• 12 feet

Tags

CCSS.7.G.B.4

What is the radius of a circle with a diameter of 45 miles?

• 22.5 miles
• 141.3 miles
• 282.6 miles
• 90 miles

Tags

CCSS.7.G.B.4