Chapter 8: Trigonometric Ratios
While trigonometry is a huge math subject in and of itself, what we are going to focus on is the very basics of it. In particular, you are going to learn how to use basic trigonometry ratios to find missing angles or sides in right triangle problems. You will become very familar with the SOHCAHTOA acronym.
Trigonometry involves the ratios of sides in right triangles. For a given angle in a right triangle, there is a leg opposite it, a leg adjacent to it, and the hypotenuse (the longest side). Look at the diagram at left, and take note of the legs that are adjacent and opposite to the angle at vertex B. Be sure to understand that the leg adjacent to angle B is the leg that is opposite angle D. The leg that is opposite angle B is the leg adjacent to angle A. The hypotenuse is always just the hypotenuse, regardless of what angle we are talking about.
Trigonometry involves the ratios of sides in right triangles. For a given angle in a right triangle, there is a leg opposite it, a leg adjacent to it, and the hypotenuse (the longest side). Look at the diagram at left, and take note of the legs that are adjacent and opposite to the angle at vertex B. Be sure to understand that the leg adjacent to angle B is the leg that is opposite angle D. The leg that is opposite angle B is the leg adjacent to angle A. The hypotenuse is always just the hypotenuse, regardless of what angle we are talking about.
Activities
5th_grader_chapter_8_right_triangle_measures.ppt | |
File Size: | 5020 kb |
File Type: | ppt |