## Math Formulas

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

### A

#### Area of a circle

Formula = $\pi r^2$.
Where,
r = the radius of the circle, and
$\pi$ = a constant with approximate 3.142.
Unit of measurement = cubic unit, e.g $cm^2$

#### Area of a cuboid

Formula = 2WL + 2LH + 2WH.
That is, (2 * W * L) + (2 * L * H) + (2 * W * H):
Where,
W = the width of the cuboid, and
L = the length of the cuboid, and
H = the height of the cuboid.
Unit of measurement = cubic unit, e.g $cm^2$

#### Area of a parallelogram

Formula = b * h.
Where,
b = the base of the parallelogram, and
h = the perpendicular height of the parallelogram.
Unit of measurement = cubic unit, e.g $cm^2$

#### Area of a rectangle

Formula = L * B.
Where,
L = the length of the rectangle, and
B = the breadth of the rectangle.
Unit of measurement = cubic unit, e.g $cm^2$

#### Area of a square

Formula = $a^2$.
Where,
a = the length of one of the sides of the square.
Unit of measurement = cubic unit, e.g $cm^2$

#### Area of a trapezium

Formula = $\frac{1}{2}$h * (a + b)
Where,
a and b = the 2 parallel sides of the trapezium, and
h = the perpendicular height of the trapezium.
Unit of measurement = cubic unit, e.g $cm^2$

#### Area of a triangle

Formula = $\frac{1}{2}$b*h.
Where,
b = the base of the triangle, and
h = the height of the triangle.
Unit of measurement = cubic unit, e.g $cm^2$

### C

#### Circumference of a Circle

Symbol:  C
Formula =  $2 \pi r$.
Where,
r = the radius of the circle, and
$\pi$ = a constant with approximate 3.142.
Unit of measurement = unit, e.g $cm$

### K

#### Kilometer to mile

Formula = 1 Km = 0.6214 Mi, consequently:
1 Mi = 1.6 Km

Where,
Km = Kilometer, and
Mi = Mile

### M

#### Mile to Kilometer

Formula = 1 Mi = 1.6 Km, consequently:
1 Km = 0.62 Mi

Where,
Km = Kilometer, and
Mi = Mile

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