Radius & Diameter
If the diameter of a circle is 12, what is the radius?
6
What is the formula to find circumference when they GIVE YOU RADIUS?
C = 2(pi)r
When working backwards from circumference what do we do to solve for diameter
Divide by 3/pi
A = pi(r2 )
What would be the correct way to substitute the radius of 7 into a formula to find circumference?
C = 2(pi)7
If the radius of Circle A is 10 what is the diameter?
20
If I have a diameter of 7 in. What is the circumference?
21 in.
A circumference of a pool is 30 meters around. What is the diameter of the pool?
10 meters
A circle has a radius of 5 mm. What is the area of that circle?
75 mm
If the diameter of a circle is 4 and the circumference is C. How could I solve for pi? Remember circumference divided by diameter
C/4
If the radius of Circle T is 4 and the radius of Circle R is half the size, what is the radius of Circle R?
2
If I have a pencil with a radius of 2 mm, what is the circumference?
12 mm
A circumference of a circular plate is 18 cm. What is the radius of that plate?
3 cm
A quarter has a diameter of 14 mm. What is the area of that quarter?
147 mm
If a basketball has a circumference of B, and a radius of 3. What would be the correct formula to find pi?
B/6
If the diameter of a coffee cup is 15, what is the radius?
7.5
A wheel has a diameter of 18 inches. What would be the circumference?
54 inches
The circumference of a wheel is 33 inches. What is the radius?
5.5 inches
A dime is half the size of a nickel. A nickel has a radius of 6 mm. What is the area of the dime?
27 mm
What is the correct formula for pi?
circumference divided by diameter
If Circle G has a radius of 18, and Circle R is twice as big as Circle G, what would be the diameter of Circle R?
18 x 2 =36 is diameter of Circle G x 2 =72 diameter of Circle R
A circular picture frame has a radius of 6 cm. What would be the measurement of the edge of the frame?
36 cm
Johnny was making pottery bowls that have a circumference of 24 cm. What is the diameter AND radius of the pottery bowl?
Diameter - 8 cm and Radius - 4 cm
Joey wants to get a lid for his cup. The lid covers the drink so it will not spill. If the lid has a radius of 22 mm, how much area would it cover for his cup?
363 mm
A circular rug has a radius of 9 feet. How much space does the rug cover?
243 feet