Vocabulary
A straight line from the center to the circumference of a circle or sphere
Radius
What is the circumference of a circle if:
the radius = 7 yds? Use 3.14 for pi.
43.96 or 14π yds
When finding the area of a semi-circle, find the area of the whole circle then divide by _____.
2
What is the area of a circle if:
the Radius = 6 in. Use 3.14 for pi.
36π or 113.04 in2
What is the diameter of a circle whose circumference is 314? Use 3.14 for pi.
100
Name the line in a circle that cuts it in half.
Diameter
What is the circumference of a circle if:
the radius = 9 yds? Use 3.14 for pi.
56.52 or 18π yds
When finding the area of a quarter-circle, find the area of the whole circle then divide by ___.
4
What is the area of a circle if:
the Radius = 3 ft. Use 3.14 for pi.
9π or 28.26 ft2
What is the diameter of a circle whose circumference is 690? Use 3.14 for pi.
219.63
The outside measurement of a circle. Or the distance around the outside of the circle
Circumference
What is the circumference of a circle if:
the radius = 8.4 yds? Use 3.14 for pi.
52.75 or 16.8π yds
What is the area of a semi-circle with a radius of 2? Answer in terms of pi.
2pi
What is the area of a circle if:
the Diameter = 12 feet? Use 3.14 for pi.
36π or 113.04 ft2
St. Patrick's Day parade is the world's oldest parade and the largest in the United States. This happens where?
The New York City
The measurement of the inside of a circle. Or how much the circle covers
Area
What is the circumference of a circle if:
the radius = 7.4 yds? Use 3.14 for pi.
46.47 or 14.8π yds
When finding the circumference of a semi-circle, you:
1. Find the circumference of the whole circle
2. Divide by 2.
3. What's step 3???
Add the diameter!
What is the area of a circle if:
the diameter = 8 in. Use 3.14 for pi.
16π or 50.24 in2
What is the radius of a circle whose circumference is 901? Use 3.14 for pi.
143.40
Pi is the constant of proportionality that relates diameter to ________ .
Circumference!
(NOT area!)
The circular fountain in front of the courthouse has a radius of 9.4 feet. What is the circumference of the fountain? Use 3.14 for pi.
What is 59 ft?
What's the circumference of a semi-circle whose diameter is 3? Answer in terms of pi
1.5*pi + 3
A dog is leashed to a point in the center of a large yard, so the area the dog is able to explore is circular. The leash is 20 feet long. What is the area of the region the dog can explore? Use 3.14 for pi.
1256
What is the radius of a circle whose circumference is 372? Use 3.14 for pi.
59.21