4/10 Activity

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

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

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

• 20ft
• 5ft
• 31.4ft
• 62.8ft

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

•  2*π*r
• 1/2 b*h
• a+b/2*h
• I do not know

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

•  π*d
• b*h
• l*w*h
• I do not know

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

• Diameter
• Radius

The radius of the circle is 9 meters.  What is the circle's circumference?

• 9 meters
• 28.26 meters
• 56.52 meters
• 18 meters

What is the area of the circle?

• 8

• 16

• 25.1

• 201.1

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

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 area of this semicircle ?

d = 8 cm

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²