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How do you find the circumfrence of a circle when you have the area?
Divide the area by pi then square root your answer which will give the radius of the circle and use 2*pi*radius to find the circumference.
What is the formula of finding the area of a circle?
Pi * R squared, where R is the radius of the circle in question
How many square inches are there in a 1 inch circle?
Assuming that 1inch is your diameter, your radius is, of course, 0.5. Since the area of a circle is expressed asA=(pi)r2simply plug in the radius to this equation. You will get your area to be pi*0.25in2, which is roughly equal to 0.78539inches2.
How do you calculate areas to 1 decimal place for a circle?
The area of a circle is calculated by multiplying pi by r2. Where r = the radius of the circle. IF we use 3.1416 as our value of pi, this means that a circle with a radius of 1 inch has an area of 3.1416 square inches. Rounding this to one decimal place gives us 3.1 square inches. Other radius - area ratios are 2 .......... 12.5665 - rounded = 12.6 3 .......... 28.2744 - rounded = 28.3 4 .......... 50.2656 - rounded = 50.3 5 .......... 78.54 - - - rounded = 78.5 6 ......... 113.0976 - rounded = 113.1 7 ......... 153.9384 - rounded = 153.9 8 ......... 201.0624 - rounded = 201.1 9 ......... 254.4696 - rounded = 254.5 10 ....... 314.16 - - - rounded = 314.2
Formula for area of cone?
Curved surface area of a cone = pi*radius*slant length
