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Earn +20 ptsQ: How do you use pi to find a circle?
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What is pi about?
Pi is the number you have to use to solve many circle equations. If you want to find the area of a circle, use radius squared times pi. For the circumference, use diameter times pi.
What formula will you use to find the circumference of a circle whose diameter is 2.2h?
Circumference of a circle = pi*diameter or 2*pi*radius
How do you find the bottom half of a circle?
To find the area of half a circle, use the formula for a circle pi*r^2 divided by 2. pi = 3.14, r = radius (half the distance across the circle)
What is the mathematical equation you generally use to find the circumference of a circle when you know the diameter?
circumference of a circle = diameter*pi or 2*pi*radius
What formula do you use to find the perimiter of a circle?
2 * pi * r
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