Functions and Operations

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A Short Table of Functions

1. The absolute value of a number, n.: Enter negatives as "-x" rather than "- x"

2. The square root of a number, (n).: The domain on this page is nonnegative values.

3. The perimeter, P(L, W) = 2(L) + 2(W), or the

area, A(L, W) = (L)(W), of a rectangle.

	Width:
Lenght:

4. Since all sides of a square are the same length,: the length equals the width, L = W.

The perimeter is four times the lenght:: P(L, W) = 2(L) + 2(W) = 2(L) + 2(L) = 4(L)
The area is the length squared:: A(L, W) = (L)(W) = (L)(L) = L²

The perimeter, P(L) = 4(L) or the

area, A(L) = L², of a square rectangle.

Lenght:

Using a radius of:
The ( or ) is:
square units or units.

6. The diagonal of a rectangle,

D(L, W)=

(L² + W²).

	Width:
Lenght:

6.5. The are of a triangle, A(b, h)= (½)(b)(h).

	height:
base:

6.75. The area of a trapezoid,

A(b₁, b₂, h)= (b₁ + b₂)(h)/2.

height:
base:
other base:

7. Distance between 2 points:

Each point is named by one, two, or three coordinates.

The distance formulas used for a line, a plane, or in space.

8. A Number to a Power.: Please do not use fractions. Rewrite the fraction as a decimal or integer number.; x: y: