Length of an Arc

mAB x 2(pi)radius

                        360

Area of sector AOB

mAB x (pi)(radius²)

                       360

Equation of a circle

r² = (x - h)² + (y - k)²

Distance Formula

 square root of

(x₂ - x₁)² + (y₂ - y₁)²

midpoint formula

x₁ + x₂ , y₁ + y₂

                                   2           2

slope formula

y₂ - y₁

x₂ - x₁

L.A. of a pyramid

1/2 (perimeter of base)(slant height)

S.A. of pyramid

1/2 (perimeter of base)(slant height) + area of base

volume of pyramid

1/3 (area of base)(height)

L.A. of cone

(pi)(radius)(slant height)

S.A. of cone

(pi)(radius)(slant height) + area of base

Volume of cone

1/3 (pi)(radius²)(height)

S.A. of sphere

4(pi)(radius²)

Volume of sphere

_4_  (pi)(radius³)

                         3

m<B = 1mAC

    2

[image]

m<C = 1 mABC

 2

[image]

m<1 = 1 (x + y)

2

[image]

m<1 = 1 (x - y)

 2

[image]

be x ed = ae x ec

in a circle, the ____ x _____ = _____ x _______

short/long