Vocabulary
Name a shape that has no edges.
Circle
What is the circumference of a circle if:
the radius = 7 yds?
43.96 yds
What is the area of a circle if:
the Radius = 6 in
113.04 in2
What is the circumference of a circle if:
the Diameter = 4 in
12.56
Name the line in a circle that cuts it in half.
Diameter
What is the circumference of a circle if:
the radius = 9 yds?
56.52 yds
What is the area of a circle if:
the Radius = 3 ft
28.26 ft2
What is the circumference of a circle if:
the Diameter = 10 in
31.40
What do you call half of the Diameter?
Radius
What is the circumference of a circle if:
the radius = 8.4 yds?
52.75 yds
What is the area of a circle if:
the Diameter = 12 feet?
113.04 ft2
What is the area of a circle if:
the Radius = 14 in
615.44 in2
The outside measurement of a circle.
Circumference
What is the circumference of Half of a Circle if:
the radius = 7.4 yds?
23.236 yds
What is the area of Half of a Circle if:
the diameter = 8 in
25.12 in2
What is the Area of a circle if:
the Diameter = 14 in
153.86 in2
The measurement of the inside of a circle
Area
The semi-circular fountain in front of the courthouse is shaped like half a pizza has a radius of 9 feet. What is the circumference of the fountain?
Draw a Picture to Help! (remember the Flat edge!)
(3.14*18) /2 +18
46.26 feet
What is the area of Half of a Circle if:
the diameter = 9 yd
31.7925 yd2
What is the circumference AND area of a circle if:
the Diameter = 10 in.
Circumference: 31.4 in
Area:78.5 in2