Solving Right Triangles

Solving Right Triangles

Grade 9 · Math · 45 min

What's Included

Learning Objective

I can solve right triangles by applying the Pythagorean theorem and trigonometric ratios to find all missing side lengths and angle measures.

Warm-Up Video

Khan Academy · 7:04

Example: Trig to solve the sides and angles of a right triangle | Trigonometry | Khan Academy

Practice Questions

7 questions · Short answer

Exit Ticket

Quick comprehension check

In right triangle ABC, where angle C is the right angle, angle A measures 28° and side BC has a length of 12. Find the length of side AB and side AC. Round your answers to the nearest tenth. In right triangle DEF, where angle F is the right angle, side DE (the hypotenuse) has a length of 20 and side DF has a length of 15. Find the measure of angle D and angle E. Round your answers to the nearest degree.

Complete Lesson Package

Get all 3 ready-to-use resources:

Teacher Guide
Student Doc
Slides