Circumference of Circles and Perimeter of Composite Shapes

What is the perimeter of this semi circle? (Use 3.14 = π and round to the nearest tenths place)

• 18.5
• 11.3
• 20.3
• 22.6

What is the perimeter of this semi circle? (Use 3.14 = π and round to the nearest tenths place)

• 12.6
• 20.6
• 25.1
• 33.1

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft
• 12.25 ft
• 10.99 ft
• 8.75 ft

After taking part in a competition, Yahir received a bronze medal with a radius of 2.5 inches. What is the medal's diameter?

• 2.5 in
• 5 in
• 4 in
• 4.5 in

The Jones family wants to enclose their circular garden with a fence. To the nearest foot, what is the minimum length of fencing they need to buy?

• 56.25 ft
• 246 ft
• 365 ft
• 393 ft

What is the radius of this circle?

• 20 in
• 10 in
• 40 in
• 10 in²

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

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

Find the perimeter of the figure.  Use 3.14 for pi.

• 20.56 in.
• 17.3 in.
• 17.8 in.
• 31.88 in.

What is the perimeter of the semi-circle?

• 11 yd
• 17.27 yd
• 34.54 yd
• 28.27 yd

What is the circumference of a circle with a radius of 54 m?

• 339.12 m
• 169.56 m
• 84.78 m