Circles Instructional

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

• Diameter

• Radius

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

• Diameter

• Radius

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m 

• 9.42 m

• 12 m

• 18.84 m

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 12cm

• 6cm

• 24cm

• 3cm

Tags

CCSS.7.G.B.4

A circle has a radius of 23 feet. What is the diameter of the circle?

• 23 feet

• 46 feet

• 1/2 feet

• none of the above

Tags

CCSS.7.G.B.4

find the area of the circle with radius 3 cm below.

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²

Tags

CCSS.7.G.B.4

What does r represent in the formula:

A = π·r²

• circumference

• radius

• diameter

• squared

Tags

CCSS.7.G.B.4

What is the area of a circle?

• The distance around a circle.

• The space inside the circle.

• A line from side to side passing through the center.

• A line from the center to the side.

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

• Radius

• Diameter

Tags

CCSS.HSG.C.A.2

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