Area and Circumference of Circles

If my diameter is 19 inches, what is my radius?

• 38 inches
• 9.5 inches
• 59.66 inches
• 119.32 inches

Tags

CCSS.HSG.GMD.A.1

If my radius is 10 ft, what is my diameter?

• 20 ft

• 5 ft

• 31.4 ft

• 62.8 ft

What is the formula for finding the circumstance for a circle with just the radius?

• 2 times π times r

• π times r²

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.
• The measurement around the circle
• The measurement from and edge of the circle to another edge through the center
• A line perpendicular to the diameter of the circle

Tags

CCSS.HSG.CO.A.1

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

• Diameter
• Radius

Tags

CCSS.7.G.B.4

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

• Radius
• Diameter

Tags

CCSS.7.G.B.4

If you multiply ½ × d  then you will get the...

• radius
• diameter
• circumference
• area

Tags

CCSS.7.NS.A.2

CCSS.7.NS.A.3

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2
• Divide the diameter by 2
• Add 2 to the diameter
• Subtract 2 from the diameter

Tags

CCSS.7.G.B.4

If the radius of a circle is 12.5 meters, the diameter is ____

• 6.25 meters
• 125 meters
• 25 meters
• 50 meters

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 12 cm

• 6 cm

• 24 cm

• 3 cm