Area and Circumference of a Circle

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

• 20ft

• 5ft

• 31.4ft

what is the circumference of this circle ?

• 3.14 cm

• 37.68 cm

• 24 cm

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

• 37.68mm

• 18.84mm

• 78.5mm

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

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

• π*d

• b*h

• l*w*h

What is the area of this circle?

• 163.2

• 15.3

• 113.1

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.HSG.C.A.2

What formula is this used for:

πr²

• Circumference

• Area

• Surface Area

What formula is this used for:

πd

• Area

• Circumference

• Surface Area