Revision Note - Math

Mid-point Theorem

Condition: $AD=DB$ and $AE=EC$

Result: $DE//BC$ and $BC=2… Read

Math

Multiplicative Law

Let $E$ and $F$ be two events.

If $E$ and $F$ are independent e

Data Handling

Mutually Exclusive Events

Let $E$ and $F$ be two events. If $E$ and $F$ are mutually excl… Read

Data Handling

Normal Distribution

The mean, the median and the mode are the same.
The curve is be

Data Handling

Parallelograms

Definition: A quadrilateral with two pairs of parallel sid

Math

Partial Variation

If $y$ is the sum of two parts, one part varies inversely as $x… Read

Math

Percentage Changed

Percentage increase $=\dfrac{\mbox{New value}-\mbox{O

Math

Permutations

For $n$ different objects, if we select $r$ objects out of th… Read

Data Handling

Prism

Lateral surface area $=$ base perimeter $\times$ height
Vo

Math

Profit and Loss

Profit $=$ Selling price $-$ Cost
Profit percentage
$= \dfr

Math

Properties of Congruent Triangles

Corresponding sides
Condition: $\Delta ABC \cong \Delta X

Math

Properties of Parallel Lines

Corresponding angles

Result: $a=b$

Reference: corr. $\an

Lines and Angles

Properties of Similar Triangles

Corresponding sides
Condition: $\Delta ABC\sim\Delta XY

Math

Properties of Slope

Parallel
For two straight lines $\ell_1$ and $\ell_2$ with

Coordinates

Pyramid

Volume $=\dfrac{1}{3}\times$ base area $\times$ height

Math

Pythagorus Theorem

Condition: Right-angled triangle

Result: $a^2+b^2=c^2$… Read

Math

Quadratic Formula

For quadratic equation $ax^2+bx+c=0$, where $a$, $b$ and $… Read

Math

Quadratic Inequality

For any real numbers $\alpha$ and $\beta$, $\alpha<\beta$.

If $(x-\

Inequalities

Range

\begin{equation*}
\mbox{Range }=\mbox{the largest data … Read

Data Handling

Rectangles

Definition: A quadrilateral with four equal interior angl

Math