CHAPTER 8Right Triangle Trigonometry

5 Videos to Watch1) http://www.khanacademy.org/math/geometry/right_triangles_topic/pyth_theor/v/the-

pythagorean-theorem

2) http://www.youtube.com/watch?v=Tdz_0_PwB0U

3) http://www.brightstorm.com/math/geometry/pythagorean-theorem/converse-of-the-pythagorean-theorem-concept/

4) http://www.youtube.com/watch?v=nVTtSE5nv7c

5) http://www.khanacademy.org/math/geometry/right_triangles_topic/cc-geometry-trig/v/basic-trigonometry

Pythagorean Theorem Facts (8.1)◦We use the Pythagorean theorem to:

◦ Solve for a missing side of a right triangle (if I know the other 2 sides)◦ Decide if a triangle is acute, obtuse or right◦ Find the distance between two points on a grid by creating a triangle with horizontal and

vertical distances

Special Right Triangle Facts (8.2)◦We use special right triangles when:

◦ We have either a 30-60-90 or 45-45-90 triangle◦ We are looking for 1 or 2 missing sides (and 1 side is given)

Trigonometry Facts (8.3 and 8.4)◦We use to solve for missing SIDES or ANGLES in a right triangle if you are given

either a SIDE and an ANGLE or 2 SIDES.

◦ Sine

◦ Cosine

◦ Tangent

◦ Secant

◦ Cosecant

◦ Cotangent