Mathematic

Place Values of Addition – Expanded Form In our decimal number system, the value of a digit depends on its place, or position, in the…

Properties of Addition There are four mathematical properties which involve addition. The properties are the commutative, associative, additive identity and distributive properties. Commutative property: Changing…

Inverse relationship of Addition and Subtraction The word ‘inverse’ means reverse in direction or position. It comes from the Latin word ‘inversus,’ which means to…

Identifying Types of Triangles by Angles The triangle is perhaps most common shape ever studied in geometry. It is a kind of polygon which has…

Identifying Types of Triangles by Sides The triangle is perhaps most common shape ever studied in geometry. It is a kind of polygon which has…

Finding the Third Angle of a Triangle Finding the third angle of a triangle when you know the measurements of the other two angles is…

Finding the Fourth Angle of a Quadrilateral Angles are measured in degrees, written °. The maximum angle is 360°. This is the angle all the…

Complementary Angles Two angles are complementary if the sum of their angles equals 900. A common case is when they form a right angle. If…

Supplementary Angles Two angles are supplementary if the sum of their angles equals 1800. A common case is when they lie on the same side…

Definitions of Sin, Cosine and Tangent A right triangle consists of one angle of 90° and two acute angles. Each acute angle of a right…

Calculating the Area of a Square Area is the size of a surface. A square has four sides all of equal length, and four corners,…

Calculating the Area of a Rectangle A rectangle is a four-sided plane figure, or any quadrilateral, with four right angles. Opposite sides of a rectangle…