Triangle Author: Kit Date:

Introduction In this slide show, we will talk about the right triangle and some properties Pythagoras’ Theorem Sin, Cos, Tan

Pythagoras’ Theorem In a right angle triangle, if we know the length of 2 out of 3 sides, then we can find the remaining side.

Pythagoras’ Theorem Please decide which is a? which is b? and which is c?

Pythagoras’ Theorem a = 3, b = 4, c = ? a = 5, c = 13, b = ? b = 8, c = 10, a = ?

Pythagoras’ Theorem Proof: Hint by area

Trigonometry Hypotenuse Opposite Adjacent Angle

Trigonometry Determine whether they are H, O, A, ang

Trigonometry What is the relationship?

Trigonometry Find sin, cos, tan for the following triangle