Categories October Surprise 2016 Circle Calculator Post author By Mike Nova Post date July 22, 2026 Calculate the area, circumference, radius and diameter of circles. Find A, C, r and d of a circle. Given any 1 known variable of a circle, calculate the other 3 unknowns. Circle formulas and geometric shape of a circle. ← Home | Microsoft Careers → RT by @mikenov: RT by @mikenov: #CIA #Iran #Russia