math+9

=Square numbers=

A square number is any number that can be represented as a perfect square.

For example:

Since a perfect square has four equal sides, and we find the area by using the formula A = L x W, this square can represented as:

4 x 4 = 16

Therefore the number 16 is a square number.

Other square numbers include: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, etc...

=Non-perfect square=

A non-perfect square is a fraction or decimal that is not a perfect square. Example: 8, 14, __7__, 0.78 10

If a number is a non-perfect square, the square root is always an approximate value. If the number is figured out on a calculator, it will have a decimal that does not end or repeat. Since we will round off our answer it is considered an approximation. Example: The square root of 7.5 is 2.738612788 on a calculator. We would round this off to 2.74

=Pythagorean Theorem=

Used for right angled triangles. The squared length of the hypotenuse is equal to the sum of the squared length of the other two sides. "c" is always the hypotenuse.

=Surface Area=

The surface area is the total area of the surface of the object.

In order to find the surface area of a composite object (two or more forms together to make one object), you must determine the surface area of each object, then subtract the area where the objects overlap.

= Formulas =





=﻿Powers=

Zero Exponent Law