Area Circumference Review

What is the circumference of a circle with a diameter of 40 in? 

• 125.6 in
• 35.17 in
• 28.67 in
• 47.17 in

What is the circumference of a circle with a radius of 21 cm?

• 131.9 cm
• 121.9 cm
• 111.9 cm
• 141.9 cm

What is the circumference of a circle with a diameter of 56 m?

• 175.8 m
• 176.8 m
• 165.8 m
• 186.8 m

The diameter of a circle is:

• The measurement around the circle.
• The distance from an edge of a circle to another edge.
• The distance from the center of the circle to an edge of a circle
• The distance from an edge of a circle to another edge through the center. 

The circumference of a circle is

• The measurement from an edge of a circle to another edge.
• The measurement around the circle
• The measurement from an edge of a circle to another edge going through the center
• The measurement from the center of the circle to an edge of the circle

Find the circumference of a circle with a radius of 12.5 mm .

• 37.68mm
• 18.84mm
• 78.5mm
• none of the above

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft
• 42 ft
• 65.94 ft
• 131.95 ft

Find the area of the circle

• 43.96
• 153.86
• 87.82
• 307.72

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

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