1. Triangle Author: Kit Date: 2013-12-18

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

3. 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.

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

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

6. Pythagoras’ Theorem Proof: Hint by area

7. Trigonometry Hypotenuse Opposite Adjacent Angle

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

9. Trigonometry What is the relationship?

10. Trigonometry Find sin, cos, tan for the following triangle