Circumference
Area
Radius
Diameter
Harder Problems
100
Find the circumference of a circle with diameter 9
9pi
100
Find the area of a circle with radius 3
9pi
100
Find the Radius
6
100
Find the Diameter
10mm
200
Find the circumference of a circle with radius 7
49pi
200
Find the area of a circle with diameter 10
25pi
200
Find the Radius
8
200
A circle with circumference 10pi
10
300
Find the circumference of a circle with area 36pi
12pi
300
Find the area of a half circle with radius 2
2pi
300
A circle with area 25pi
5
300
Diameter of a circle with area 9pi
6
400
Find the area
48+16pi
500
Find the perimeter
20+4pi