Home | Learning | History | Fun |Real-Life | Help/Contact | Index/Site-Map Lessons 1. Basics 2. Deductive Reasoning    • 2.1 If-Then Statements    • 2.2 How To Prove             Theorems    • 2.3 Pairs Of Angles    • 2.4 Perpendicular Lines 3 - Parallel lines    • 3.1 Parallel Lines    • 3.2 Angles    • 3.3 Inductive Reasoning 4 - Congruent Triangles    • 4.1 Congruent Triangles    • 4.2 Ways to prove it    • 4.3 Bisectors 5 - Quadrilaterals    • 5.1 Parallelograms    • 5.2 Parallel lines             Theorem    • 5.3 Special             Parallelograms    • 5.4 Trapezoids 6 - Inequalities    • 6.1 Inequalities    • 6.2 Inequalities In A             Triangle    • 6.3 Inequalities In 2             Triangles 7 - Similar Polygon    • 7.1 Ratios and             Proportion    • 7.2 Similar Polygons    • 7.3 Similar Triangles 8 - Rt. Triangles    • 8.1 Right Triangle    • 8.2 Trig. In Geometry 9 - Circles    • 9.1 Tangents, Arcs, and       Chords    • 9.2 Angles and             Segment 10 - Constructions    • 10.1 Construction    • 10.2 Perpendicular Lines    • 10.3 Parallel Lines    • 10.4 Concurrent Lines    • 10.5 Circles 11 - Areas of 2D objects    • 11. 1 Areas Of                Polygons    • 11. 2 Circles and                Similar Figures 12 - Areas and Volumes    • 12.1 Prisms    • 12.2 Pyramids    • 12.3 Cylinders and                cones    • 12.4 Spheres    • 12.5 Similar solids 13 - Coordinates    • 13.1 Geometry and                Algebra Trigonometry in Geometry   Objective:             • Learning about tangent, sine, and cosine rations for an acute angle           • Using tangent, sine, and cosine rations to solve right triangle problems   Lesson 8-2 Trigonometry in Geometry:             Tangent Ratio: The measure of the leg opposite of the angle over the measure of the leg adjacent of the angle.      Tangent of / A = (Leg opposite / A )/ (Adjacent leg / A)     Tangent of / A = 3/4             Sine: The measure of the leg opposite of the angle over the measure of hypotenuse   Sine of / A = (Leg opposite / A )/ Hypotenuse Sine of / A = 4/5                Cosine: The measure of the leg adjacent to the angle over the measure of the hypotenuse   cosine of / A = (Leg adjacent to / A )/ Hypotenuse cosine of / A = 3/5   Easy way to remember trigonometric ratios:    Soh, Cah, Toa     or    Oh Heck, Another Hour of Algebra   Sin A= Opp/ hyp Cos A= Adj/ hyp Tan A= Opp/ adj Quickie Math Copyright (c) 2000 Team C006354