HERE OUR FUNNY WAY TO CLEAN YOUR COMPUTER

Pre - Algebra

Types of angles

o   Acute angle

An acute angle is an angle whose measure is less than 90 degrees.

o   Right Angle

A right angle is an angle whose 90 degrees.

o   Obtuse Angle

An obtuse angle is an angle whose measure is bigger than 90 degrees but less than 180 degrees.

o   Straight Angle

A straight angle is an angle whose measure is bigger than 180 degrees.

o   Reflex Angle

An angle whose measure is bigger than 180 degrees but less than 360 degrees.

o   Adjacent Angle

An adjacent angle is an angle with a common vertex and one common side.

o   Supplementary Angle

Supplementary angles that have two angles whose measure have 180 degrees.

o   Complementary Angle

A supplementary angle that has two angles whose measures add to 180 degrees.

o   Vertical Angle

Are angles that have a common vertex and whose sides are formed by the same lines.

o   Alternate Interior Angles

Are pairs of interior angles on opposite sides of the transversal.

o   Alternate Exterior Angles

Are pairs of exterior angles on opposite sides of the transversal.

o   Corresponding Angles

Corresponding angles are pairs of angles that are in similar positions.

Pre-Algebra

Divisibility Rules

Divisibility Rules for 2

1.     All even numbers are divisible by 2. E.g., all numbers ending in 0,2,4,6 or 8.

Ex.228

 Divisibility Rules for 3

1.  Add up all the digits in the number.

2.  Find out what the sum is. If the sum is divisible by 3, so is the number.

Ex.3345

Divisibility Rules for 4

1.     The last two digits are divisible by 4.

Ex. 812

Divisibility Rules for 5

1.     Numbers ending in a 5 or a 0 are always divisible by 5.

Ex. 500

Divisibility Rules for 6

1.     The number is divisible by both 2 and 3.

Ex. 114

Divisibility Rules for 9

1.   Add up all the digits in the number.

2.  Find out what the sum is. If the sum is divisible by 9, so is the number.

Ex. 9432