area of a trapezoid =

base₁ + base₂    x  height

area of hexagon

3s²√3

2

circumference of a circle=

2∏r

or

∏d

length of an arc=

n/360 • 2∏r

area of a circle=

∏r²

area of a sector=

n/360 • ∏r²

surface area of a sphere=

4∏r²

volume of a sphere

4/3 ∏r³

lateral area of a cone=

1/2 circumference x l (slant height)

volume of a cone=

1/3∏r²h

distance between two coordinates

__________________

√(x₁-x₂)² + (y₁-y₂)²            

perpendicular lines have slopes that are ________

negative reciprocals of each other

ex: 2 and -1/2

cot=

1

sin²x + cos²x = 1

tan² x + 1= sec² x

1+ cot² x= csc² x