## Alternate Interior Angles

Definition When two lines are crossed by another line (Transversal): Alternate Interior Angles are a pair of angles on the inner side of each of those 2 lines but on opposite sides of the transversal. How To remember: The angle pairs are on Alternate sides of the Transversal, and they are on the Interior of

## Composition of Functions

By combining these 2 function into 1 function, we have performed function composition, which is the focus of this section. Definition of Function Composition Function composition is a method to combine existing functions. Another method is to carry out the usual algebraic operations on functions, including addition, subtraction, multiplication, & division. We do this by

## Quadrilateral: Definition, Properties, Family Tree, Formula, Examples

What Is Quadrilateral Quadrilateral is two-dimension shape that closed and has four sides. It come from latin words, “quadri” means four and “lateral” means sides. The internal angle is 360°. In real life, there are many things that has quadrilateral shape. For example: table top, book, picture, kite, envelope, etc. Quadrilateral Properties There are two

## Sphere: Definition, Properties, Surface Area, Volume, Spheroid, and Hemisphere

Sphere is like circle in two-dimensional shape. But it is three-dimensional shape. Sphere things in daily life are like bubbles, marbles, balloons, balls, water drops, etc. Definition of Sphere Sphere is three-dimensional shape. It is a set of points that has same distance to the center. The distance is called radius (r). besides that, it

## Probability of Independent Events: Definition, Formula, Examples

What Is Independent Event? Independent means not relate with something/someone. For examples of independent condition are buying a chocolate and finding a pencil on the road, writing a letter and sweeping the floor, etc. The events in examples of independent condition are not relate each other. It is not causal relationship between of them. Probability

## Sohcahtoa

Definitions Just an easy way to remember how Sine, Cosine and Tangent work: Soh…   (Sine = Opposite / Hypotenuse) …cah…  (Cosine = Adjacent / Hypotenuse) …toa (Tangent = Opposite / Adjacent) Right Triangle Firstly, the names Opposite, Adjacent and Hypotenuse come from the right triangle: “Opposite” is opposite to the angle θ “Adjacent” is adjacent (next to) to

## Fibonacci Sequence

About Fibonacci (The Man) His real name was Leonardo Pisano Bogollo. He lived in Italy between 1170 and 1250. “Fibonacci” was his nickname, which roughly means “Son of Bonacci”. Fibonacci was not the first to know about the sequence, it was known in India hundreds of years before! As well as being famous for the Fibonacci

## Quadratic Equation Solver

A quadratic is a type of problem In mathematics that deals with a variable multiplied by itself (an operation known as squaring). It derives from the area of a square being its side length multiplied by itself. The word quadratic comes from “quadratum”, which means square in Latin word. There are a lot of phenomena in the real world that can be

## Solving SSA Triangles

SSA (Side, Side, Angle) is when we know 2 sides and 1 angle that is not the angle between the sides. How to solve an SSA triangle ? First, use Law of Sines to calculate one of the other two angles. Then, use the three angles add to 180° to find the other angle. Finally

## Vertical Angles

Definition Vertical Angles are the angles opposite each other when two lines cross In this case, “Vertical” means they share the same corner point (Vertex), not the usual meaning of up-down. Example a° and b° are vertical angles. Vertical Angles are Congruent Angles The interesting thing here is that vertical angles are congruent angles: a°