Finding Circumference, Radius, and Diameter of Circles

Which segment is the diameter?

• AC

• BD

• LM

• CE

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 circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

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

• 37.68mm

• 18.84mm

• 78.5mm

• none of the above

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

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

•  π*d

• b*h

• l*w*h

• I do not know

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

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²

• Secant
• Diameter
• Radius
• Chord