User:Quantum Burrito/Fun with LaTeX

Pythagorean theorem:
 * $$h=\sqrt{a^2+b^2}$$

Area of triangle:
 * $$a=\frac{bh}{2}$$

The simultaneous equations
 * $$Ax+By=E$$
 * $$Cx+Dy=F$$

can be represented in matrix notation:

\left( \begin{array}{cc} A& B\\  C& D \end{array} \right)

\left( \begin{array}{c} x\\  y \end{array} \right)

=

\left( \begin{array}{c} E\\  F \end{array} \right) $$