Area, Circumference & Perimeter Formulas
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Circumference
(perimeter) All the way around a circle, also known as perimeter of circle
Perimeter
The distance around a figure or object
diameter
d=2r
Inside, cover, paint
find the area
rim, edge, fence, outside
find the circumference
Surface Area
Find the area of A, B and C. Add all three. Multiply by 2
radius
r=d/2
Area
the surface inside an object