area and circumference of circles

The distance halfway across the circle is called the...

• radius

• diameter

• circumference

• area

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

• Radius
• Diameter

Tags

CCSS.HSG.C.A.2

What is the radius of this circle?

• 18
• 36
• 9
• 6

Tags

CCSS.7.G.B.4

What is the diameter of this circle?

• 3.5
• 6.5
• 6
• 7

Tags

CCSS.7.G.B.4

What is circumference?

• 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.

Find the circumference of the circle

• 21.98
• 153.86
• 43.96
• 615.44

Tags

CCSS.7.G.B.4

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

Tags

CCSS.7.G.B.4

what is the circumference of this circle ?

• 3.14 cm 
• 37.68 cm
• 24 cm
• 68.4 cm

Tags

CCSS.7.G.B.4

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

Tags

CCSS.7.G.B.4

Find the area of the circle

• 21.98 units²

• 153.86 units²

• 87.82 units²

• 615.44 units²

Tags

CCSS.7.G.B.4