Formulas

Simple Interest

I = Prt

I: Interest

P: Principle

t: time (number of iterations)

Perimeter of a Polygon

P = Sum of all the sides

Circumference:

C = πd = 2πr

C: circumference

d: diameter

r: radius

Area of a Parallelogram (including rectangles and squares)

A = bh

A: area

b: base (length of a side)

h: altitude (height from base to base)

Area of a Triangle

A = bh / 2

A: area

b: base (length of a side)

h: altitude (height from base to vertex)

Surface Area of a Prism (right prisms only)

S = 2B + PH

S: surface area

B: area of the base

P: perimeter of the base

H: altitude (height from base to base)

Surface Area of a Pyramid (right pyramids only)

S = B + Pℓ/2

S: surface area

B: area of the base

P: perimeter of the base

ℓ: slant height (height of the lateral face)

Volume of a Prism

V = BH

V: volume

B: area of the base

H: altitude (height from base to base)