11.5 times pi yds
circumference = 9.3*pi yards
Circumference = diameter x Pi C=100 x 3.14 C=314yrds
Circumference = pi times D = 3.6 pi = 11.30973 yds (rounded) = approx. 11yds 11.15in
To measure the concrete needed for a circular pad:-- Decide how thick (deep) the pad is to be. If it's in inches, divide by 12 for thickness in feet.-- Measure either the circumference or the diameter of the circle, in feet.-- If you measured the circumference, then the cubic yds of concrete needed is(0.00295) x (circumference) x (circumference, again) x (thickness) ... all in feet-- If you measured the diameter, then the cubic yds of concrete needed is(0.0291) x (diameter) x (diameter, again) x (thickness) ... all in feet
(Note: for typing purposes, pi will be represented as n) The formula for circumference is 2nr. First we need to find 'r' which stands for radius (the straight distance from the centre of the circle to the edge). Since the radius is half of the diameter, the radius is 70/2=35 yds. Now we can put 35 yds into the formula: 2*n*35 = 219.91 yds (rounded to 2 decimal places).
Formula for finding circumference is Pi (3.14) X diameter, so 12 yds times 3.14 = yds. Formula for area is Pi (3.14) x radius (1/2 the diameter=6) squared. So the radius squared is 6 X 6 = 36, X 3.14. You can do the math! Area will be in square yds.
circumference of a circle = 2 * radius * pi= 2 * 3.5 * 3.14159= 21.99113 yds
The radius a circle with area of π*121 yd2 is 11 yds [= sqrt(121)] The circumference, therefore, is 2*11*π = 22*π yards.
50.2656 square inches The formula to find the area of a circle is ∏r2. Where ∏ is the mathematical constant and r is the radius of the circle. So 3.14 x 42. = 50.27 square cm or yds, (whatever the diameter was in).
Area = π × radius² → radius = √(Area / π) Circumference = 2 × π × radius = 2 × π × √(Area / π) = 2 × √(Area × π) 1 acre = 4840 sq yds → circumference = 2 × √(1.5 × 4840 sq yds × π) ≈ 302 yds.
To find the diameter of a circle with an area of 1 acre, we first need to convert the area from acres to square feet. One acre is equal to 43,560 square feet. The formula to calculate the diameter of a circle from its area is diameter = 2 * √(area / π). Substituting the area of 43,560 square feet into the formula gives us a diameter of approximately 235 feet.
Circumference (C) is the distance around the circle and you want to know what the area(A) of the circle is? First you must find the diameter (D) of the circle, then the radius (R), and finally calculate A. {1} If C = Pi X D, then C/Pi = D, hence 3081 / 3.1416 = 98.071046. {2} D/2 = R, hence 98.071046 / 2 = 49.035523 {3} A = Pi X R-squared; hence, 49.035523 X 49.035523 = 2404.4825 X 3.1416 = 7553.9222 sq yds.