Vocabulary
Name a shape that has no edges.
Circle
What is the circumference of a circle if:
the radius = 7 yds?
43.96 or 14π yds
What is the circumference of a circle if:
the Diameter = 4 in
12.56 or 4π in
What is the area of a circle if:
the Radius = 6 in
36π or 113.04 in2
A homeowner wants to build a circular fence around their garden, which has a diameter of 23 feet. How much fencing will they need?
72.22 feet of fencing.
What is the name of the full length of the line inside a circle?
Diameter
What is the circumference of a circle if:
the radius = 9 yds?
56.52 or 18π yds
What is the circumference of a circle if:
the Diameter = 10 in
31.40 or 10π in
What is the area of a circle if:
the Radius = 3 ft
9π or 28.26 ft2
A circular swimming pool has a diameter of 20 feet. A cover for the pool needs to be purchased. What is the area of the cover, in square feet, that will be needed to completely cover the pool?
314 square feet
What do you call half of the Diameter?
Radius
What is the circumference of a circle if:
the radius = 8.4 yds?
Use 3.14 for π
52.752 yds
What is the area of a circle if:
the Radius = 14 in
Use 3.14 for pi
615.44
What is the area of a circle if:
the Diameter = 12 feet?
36π or 113.04 ft2
Mark is going to cover his circular patio with new tiles. The patio has a radius of 15 feet. How many square feet of tiles will he need?
706.5 square feet
The outside measurement of a circle.
Circumference
What is the circumference of a circle if:
the radius = 7.4 yds?
Express your answer in terms of π
14.8π yds
What is the Area of a circle if:
the Diameter = 14 in
Express your answer in terms of π
49π in2
What is the area of a semicircle if:
the diameter = 8 in
Express your answer in terms of
8π in2
What are the first two numbers after the decimal in Pi?
.14
The measurement of the inside of a circle
Area
The circular fountain in front of the courthouse has a radius of 9.4 feet. What is the circumference of the fountain? Round to the nearest tenth.
59 ft
What is the circumference AND area of a circle if:
the Diameter = 10 in.
Circumference: 10pi or 31.4 in
Area: 25pi or 78.5 in2
What is the area of a quarter circle if:
the radius = 4.3 yd
14.5 or 4.6225pi yd2
What is the Estimate value of pi?
3