If you're using pie it would be
2*
*5 because the radius is half of the diameter.
But since you're using three it's
2*3*5
If it helps remember: Twinkle twinkle little star, circumference equals 2 pi r
2*
But since you're using three it's
2*3*5
If it helps remember: Twinkle twinkle little star, circumference equals 2 pi r