Vocabulary
A circle is the set of all points in a plane that are the same distance away from a point called the...
center
Given: Radius = 7 mm
The diameter is...
14 mm
Given: Radius = 5 mm
The circumference is...
31.4 mm
Given: Radius = 5 mm
The area is...
75.5 mm2
Given: Radius = 5 mm
The area of the semicircle is...
39.25 mm2
The distance from the center to any point on the circle is called...
Given: Diameter = 50 in
The radius is...
25 in
Given: Diameter = 10 m
The circumference is...
31.4 m
Given: Radius = 8 cm
The area is...
200.96 cm2
Given: Diameter = 14 m
The area of the semicircle is...
76.93 m2
The distance across the circle through the center is called...
the diameter
Given: Diameter = 150 ft
The radius is...
75 ft
Given: Radius = 2.1 yd
The circumference is...
13.188 yd
Given: Diameter = 10 in
The area is...
78.5 in2
Given: Radius = 20 in
The area of the semicircle is...
628 in2
The distance around a circle is... and its formula is...
the circumference
C = pi(d)
C = 2(pi)r
Given: Radius = x
The diameter is...
2x
Given: Diameter = 82 cm
The circumference is...
257.48 cm
Given: Diameter = 5 mi
The area is...
19.625 mi2
Given: Radius = 5 mm
The circumference of the semicircle is...
25.7 mm
The formula for the area of a circle is...
A = pi(r2)
Given: Diameter = xy
The radius is
(xy)/2
Given: Diameter = xy
The circumference is...
pi(xy)
Given: Radius = xy mm
The area is...
A = pi(xy)2
Given: Diameter = 16 mi
The circumference of the semicircle is...
41.12 mi