Area of Circles
The formula for area of a circle
what is TTr2?
move the decimal to the left twice
how to convert a percent to a decimal
the difference between radius and diameter
radius is from the center of the circle to one side and diameter is from one side, through the center point to the otehr side of the circle
the proportion to find the number of quarters in 4 dollars
4/1=x/4
always the denominator
100
r2 is the same thing as
what is r*r
50% as a decimal
0.5 or 0.50
the difference between circumference and area
circumference is the distance around the circle and area is the space inside the circle
the proportion of radius to diameter
r/d=1/2
37% as a fraction
37/100
area of a circle with radius of 5
what is 25TT or 78.5 units2
33% as a decimal
0.33
formulas for circumference of a circle
C=2TTr and C=TTd
the proportion to find how many inches in 3 feet
50% as a fraction
50/100 or 1/2
what is 0.25TT or 0.785 units2
14.25% as a decimal
0.1425
circumference of a circle with radius of 11in
22TT or 69.08in
the number of quarters in 4 dollars
16
0.25% as a fraction
0.25/100
area of circle with diameter of 20
what is 100TT or 314 units2
0.03% as a decimal
0.0003
circumference of a circle with diameter of 100cm
100TT or 314cm
how many inches in 3 feet
36
0.0013% as a fraction
0.0013/100