Circumference
Division
Area Formulas
Multiplication
Area of a Circle
100
What is the formula for circumference using the diameter?
C=πd
100
Solve 18÷3
6
100
What is the formula for the area of a square?
A=s²
100
Solve 6x4
24
100
What is the formula for the area of a circle?
A=πr²
200
What is the formula for circumference using the radius?
C=2πr
200
Solve 32÷4
8
200
What is the formula for the area of a rectangle?
A=w*l/h
200
Solve 9x4
36
200
What is the area of a circle if the radius is 3 inches?
28.26 inches²
300
What does pi equal?
3.14
300
Solve 56÷8
7
300
What is the formula for the area of a triangle?
A=½bh
300
Solve 8x7
56
300
What is the area of a circle if the diameter is 16 km?
200.96 km²
400
What is the circumference if the radius is 8 miles?
50.24 miles
400
Solve 84÷12
7
400
What is the formula for the area of a parallelogram?
A=bh
400
Solve 9x12
108
400
What is the radius of a circle if the area is 314 meters²?
10
500
What is the diameter if the circumference is 109.9 meters?
35 meters
500
Solve 121÷11
11
500
What is the formula for the area of a trapezoid?
A=½h(b1-b2)
500
Solve 89x11
979
500
What is the diameter if the area of a circle is 1256 centimeters²?
40 centimeters
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