Vocabulary
The distance from the center to a point on the circle.
What is a radius?
If the radius is 2in, what is the diameter?
What is 4in?
The diameter is 16in, what is the circumference?
50.24 in
r2 means to what?
r x r
A circular rug needs to fit into a room with an area of 100 ft2. If the rug has a radius of 6ft, will the rug fit in the room?
What is no? The area is 113.04 ft2
The distance from one point on the circle to another point and goes through the origin.
What is a diameter?
If the diameter is 8cm, what is the radius?
What is 4cm?
The diameter is 1cm, what is the circumference?
What is 3.14 cm?
the radius is 2in, , what is the area?
12.56 in2
A family is wanting to re-tile the outside edge of their circular swimming pool. If the diameter of the pool is 16 ft, how many ft of tile will they need?
50.24 ft of tile
The perimeter of a circle.
What is circumference?
If the radius is 3.5 m, what is the diameter?
What is 7m?
The radius is 11 m, what is the circumference?
69.08 m
If the radius is 8m, what is the area?
200.96 m2
A bicycle trail in the shape of a circle has a diameter of 3 miles. Michelle bikes around the trail 4 times. About how far did she bike?
37.68 miles
The amount of squares that can fit in the inside of a circle.
If the Diameter is 12.50 in, what is the radius?
What is 6.25 in?
The radius is 2.5km, what is the circumference?
15.7 km
If the diameter is 6 in, what is the area?
28.26 in2
A cake decorator is trying to ice the top of a round cake. If the diameter of the cake is 10 in, how much cake is the icing needing to cover?
78.5 in2
A line that goes from one point on the circle to another point, but does not go through the center.
What is a chord?
If the Radius is 6.7m, What is the diameter?
What is 13.4m?
The radius is 6.2 in, what is the circumference?
What is 38.936 in
If the diameter is 25km, what is the area?
490.625 km2
The outside radius of a truck tire is 11 inches. Approximately how far will the truck have traveled after 3 rotations of the tires?
207.24 in