Introduce your Geometry students to right triangle trigonometry with this clear, scaffolded guided notes and practice resource. Students learn how to identify opposite, adjacent, and hypotenuse, choose the correct trigonometric ratio, and solve for missing side lengths and angles using SOHCAHTOA.

This resource gradually builds understanding through visual explanations, guided examples, and practice problems so students can confidently apply trig ratios to solve right triangles.

Students will:

• Label triangle sides relative to a reference angle
• Select the correct tri ratio (sine, cosine, tangent)
• Use trig ratios to find missing side lengths
• Use inverse trig functions to find missing angles
• Apply trig in geometric problem-solving situations
• Introduction to Trigonometry

What’s Included:

• Unit learning targets
• Introduction to trig ratios
• SOHCAHTOA reference chart
• Labeling opposite, adjacent, and hypotenuse
• Choosing the correct trig ratio based on given information
• Students apply sine, cosine, and tangent to solve right triangles.
• Students learn to use inverse trig functions to solve for angles.

Skills Covered:

Students will learn to:

• Identify opposite, adjacent, and hypotenuse
• Apply SOHCAHTOA
• Choose appropriate trig ratios
• Solve for missing side lengths
• Use inverse trig functions to find angles
• Solve right triangle problems in geometry

Perfect For:

✔ Geometry units on trigonometry

✔ Right triangle trig introduction

✔ Guided notes

✔ Independent practice

✔ Math centers

✔ Homework

✔ Sub plans

✔ Review before trig applications