6.7 & 6.11 REVIEW

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

C is 15.5 inches. Diameter is 5 inches. What is the best approximate value of π?

• 5 ÷ 15
• 5 x 15
• 15 ÷ 5
• 15 x 5

Which of the following choices is closest to the area of a circle? (d = 9 cm)

• 253.34 cm²
• 63.59 cm²
• 56.52 cm²
• 28.26 cm²

The radius of a circular swimming pool is 6.1 meters. Which is closest to the circumference of this swimming pool?

• 19.48 m
• 74.42 m
• 38.33 m
• 116.90 m

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

• Diameter
• Radius

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side