GUATEMALA CITY - Torrential rains brought by the first tropical storm of the 2010 season pounded Central America and southern Mexico, triggering deadly landslides. The death toll stood at 15 Sunday but authorities said the number could rise.
Archimedes proved the formula for the area of a circle (A = Ï r 2, where r is the radius of the circle) and showed that the value of Ï lay between 3 + 1/7 (approximately 3.1429) and 3 + 10/71 (approximately 3.1408).
Best Answer: That's exactly what it means: 2 times Pi times r. You are right! Yes, it's 2 times Pi times r. It is the formula to find the circumference of a circle. It means, you multiply 2, and pi, and the radius (r) all together.... say if your radius was 4.... thats what the equation would look like when the radius plugged in.