Circle Parts
Draw a radius.
Circumference when d = 2
C = 6.28
What is the area of a circle with r = 3
A = 28.26
Perimeter of a semi-circle with d = 5
p = 12.85
What is the area of a semi-circle with r = 9
A = 127.17
Draw a diameter.
A line segment from two points on the circle that goes THROUGH the CENTER.
Circumference when d = 21
C = 65.94
What is the area of a circle with r = 2.1
A = 13.8474
Perimeter of a semi-circle with d = 12
P = 30.84
What is the area of a semi-circle with r = 2
A = 6.28
If the diameter is 26, what is the radius?
13
Circumference when r = 4
C = 25.12
What is the area of a circle with d = 8
Perimeter of a quarter circle with r = 3
P = 10.71
What is the area of a semi-circle with d = 3
A = 3.5325
If the radius is 14, what is the diameter?
28
Circumference when r = 5
C = 31.4
What is the area of a circle with d = 40
A = 1256
Perimeter of a quarter circle with r = 10
P = 35.7
What is the area of a quarter-circle with r = 5
A = 19.625
Draw the CENTRAL ANGLE: <CAT
A circle with center A and points C & T on the circle.
Circumference when r = 2.3
C = 14.444
What is the area of a circle with d = 7
A = 38.465
What is the diameter of a circle with circumference = 18.84
d = 6
What is the area of a quarter-circle with d = 9
A = 15.89625