Math formula help

what are the formulas for area and circumference?

all of them. its on our 8th grade test! and I forgot them

Answer #1

area= length multiply times with circumference is Pi times diameter

Answer #2

Area = base x height divided by 2 (triangle) Area = length x width (square/rectangle)

Circumference = Pi x radius squared

Answer #3

Area of triangle: 1/2bh Area of square: length x width circumference of circle: Pi x radius squared or Pi x diameter or 2Pi x radius

Answer #4

since when did radius squared become the diamter? are squared is not equal to 2r… (unless are happens to be 2…)

The area of a circle is pi r2 (radius squared multiplied by pi)

The circumference of a circle is pi x d (pi multiplied by the diameter) (diameter = 2r)

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