## Triangle similarity

This tutorial explains a similar (but not congruent) idea to congruency (if that last sentence made sense, you might not need this tutorial). Seriously, we'll take a rigorous look at similarity and think of some reasonable postulates for it. We'll then use these to prove some results and solve some problems. The fun must not stop!

## Introduction to the trigonometric ratios

Learn what sine, cosine, and tangent are.

## Solving for a side in a right triangle using the trigonometric ratios

Learn how to find a side length in a right triangle when given one side length and one acute angle.

## Monday, December 14, 2015

### Division M Sunday Dec 14, 2015 Resources

Factorials, Counting:
http://artofproblemsolving.com/videos/counting

Zero Factorial:
https://youtu.be/Mfk_L4Nx2ZI

Modular Arithmetic (Remainders):
What is Modular Arithmetic
The Quotient Remainder Theorem

Modular Arithmetic Sheet from Math Counts Handbook: http://1drv.ms/1Z7ZKN7

Sequences:
Introduction to Sequences