Pi r squared is the formula for the area of a circle. 2 pi r squared is twice that.
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Let C be the circumference, r be the radius, and (pie)= 3.141592654 C = 2 x (pie)x r r = C ÷ (2 x (pie))
(2)(pie)(r)(h) + (2)(pie)(r - squared) = tot area of a cylinder
No, the formula for a circumference of a circle is 2(pie)r For example, if r is 6, the the circumference is 12(pie)
since c of the pool is 18 then 2pieR = 18 /2 pieR=9 /pie R=9/pie the radius is 9/pie
The pie tin is circular. So apply the circular equation/ C = 2 pi r Algebraically rearrange r = C / ( 2 pi) r = 25/(2 x 3.14) C = 25/ 6.28 C = 3.9808.... incges ~ 4 inches,.