Lesson: Right Triangle Trigonometry: Solving for an Angle Mathematics

In this lesson, we will learn how to find a missing angle in a right triangle using the appropriate inverse trigonometric function given two side lengths.

Lesson Plan

Objectives

Students will be able to

  • find an unknown angle measure in a right triangle (given a figure) using the sine, cosine, and tangent ratios, and their inverse functions,
  • draw a figure from a question and determine an unknown angle in a right triangle,
  • interpret and solve real-life and applied problems using right triangle trigonometry.

Prerequisites

Students should already be familiar with

  • the Pythagorean theorem,
  • solving for a side in a right triangle using the trigonometric ratios (sine, cosine, and tangent).

Exclusions

Students will not cover

  • non-right triangle trigonometry.

Lesson Video

Video Thumbnail
12:11

Lesson Explainer

Sample Question Videos

  • 03:46
  • 02:57
  • 02:56

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