Cheat Sheet
Trigonometry Cheat Sheet: SOH CAH TOA
A compact reference for right triangle trigonometry in 9th grade: labeling the opposite, adjacent and hypotenuse, choosing sine, cosine or…
- Difficulty
- Level 2 · Standard
- Time
- 20 min
Extra practice for 9th Grade Trigonometry (Finding Sides) Worksheet — Level 3: the same skill with fresh questions.
Worksheet9th GradeLevel 3 · Challenge
Free 9th Grade Trigonometry (Finding Sides) Worksheet — Level 3 — Practice Set 4
Practice Set 4 for 9th Grade Trigonometry (Finding Sides) Worksheet — Level 3: the same skill and level with a fresh set of questions and a full answer sheet.
More practice: Set 1 · Practice Set 2 · Practice Set 3 — same skill, fresh questions, full answers.
Instant download · No sign-up · Free for personal, classroom and homeschool use
- Grade
- 9th Grade
- Subject
- Math
- Topic
- Trigonometry
- Difficulty
- Level 3 · Challenge
- Estimated time
- 20 minutes
- Curriculum
- Texas grade levels (TEKS)
- Questions
- 8
- Answers
- Included, with working
- Format
- PDF (A4), print or complete online
Students will practice
- labeling sides relative to an angle
- choosing the correct trigonometric ratio
- finding unknown sides
Curriculum: Texas grade levels (TEKS). We show specific outcome codes only where they have been verified against the official curriculum document.
What's next?
Completed: 9th Grade Trigonometry (Finding Sides) Worksheet — Level 3 — Practice Set 4
Ready for more? Move on to 10th Grade Math.
How to use this worksheet
- Print the PDF or complete it on screen. Write the student's name and date at the top.
- Read the instructions for each part together before starting. Encourage working to be shown, not just answers.
- Mark with the answer sheet. Compare the method, not only the final answer, and give credit for correct working.
- Record the score, celebrate what went well, then follow the "What's next" suggestion.
Common questions
Who is this worksheet for?
9th Grade students (typically ages 14–15) working on trigonometry. It is pitched at level 3 · challenge; an easier version is linked above.
Are the answers included?
Yes. The PDF includes a full answer sheet with the working for every question. You can also view the answers online.
How long does it take?
About 20 minutes for 8 questions. Short, regular sessions work best: two or three a week beats one long one.
Do I need to sign up to download?
No. Click Download Free PDF and it opens immediately. It is free for personal, classroom and homeschool use.
What should we do next?
Explore more 9th Grade mathematics resources.
Preview
Success TutoringWorksheets9th Grade · Mathematics · Trigonometry9th Grade Trigonometry (Finding Sides) Worksheet — Level 3 — Practice Set 4
Name
Date
Score /
Label the sides (opposite, adjacent, hypotenuse), choose the ratio (SOH CAH TOA), then solve.
1.In a right triangle, the side adjacent to a 57° angle is 9 m. Find the opposite side, to 1 decimal place.
2.In a right triangle, the hypotenuse is 15 cm and one angle is 55°. Find the side adjacent to the 55° angle, to 1 decimal place.
3.In a right triangle, the side adjacent to a 50° angle is 5 m. Find the opposite side, to 1 decimal place.
4.In a right triangle, the side adjacent to a 24° angle is 25 m. Find the opposite side, to 1 decimal place.
5.In a right triangle, the side adjacent to a 54° angle is 8 m. Find the opposite side, to 1 decimal place.
6.In a right triangle, the hypotenuse is 5 cm and one angle is 50°. Find the side adjacent to the 50° angle, to 1 decimal place.
7.In a right triangle, the hypotenuse is 18 cm and one angle is 65°. Find the side opposite the 65° angle, to 1 decimal place.
8.In a right triangle, the hypotenuse is 26 cm and one angle is 52°. Find the side adjacent to the 52° angle, to 1 decimal place.
Preview — the PDF contains the full resource and answer sheet.
More 9th Grade trigonometry resources
- Worksheet
9th Grade Trigonometry (Finding Sides) Worksheet — Level 1
Use sine, cosine and tangent to find unknown sides in right triangles. Builds confidence with the core skill before adding complexity.…
- Difficulty
- Level 1 · Easier
- Time
- 20 min
- Questions
- 8 questions
- Answers
- Answers included
- Worksheet
9th Grade Trigonometry (Finding Sides) Worksheet — Level 2
Use sine, cosine and tangent to find unknown sides in right triangles. Expected-level practice for this grade. This 9th Grade worksheet…
- Difficulty
- Level 2 · Standard
- Time
- 20 min
- Questions
- 8 questions
- Answers
- Answers included
- Worksheet
9th Grade Trigonometry (Finding Sides) Worksheet — Level 3
Use sine, cosine and tangent to find unknown sides in right triangles. A challenge set for students ready to stretch further. This 9th…
- Difficulty
- Level 3 · Challenge
- Time
- 20 min
- Questions
- 8 questions
- Answers
- Answers included
Trigonometry in other year levels
- 10th Grade Trigonometry (Finding Sides) Worksheet — Level 1
Worksheet · 10th Grade · Trigonometry · Level 1 · Easier
- 10th Grade Trigonometry (Finding Sides) Worksheet — Level 2
Worksheet · 10th Grade · Trigonometry · Level 2 · Standard
- Trigonometric Identities and Equations
Worksheet · 11th Grade · Trigonometry · Level 3 · Challenge
- Introduction to Vectors: Components, Magnitude and Direction
Worksheet · 11th Grade · Trigonometry · Level 2 · Standard
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About this resource
- Created by
- Success Tutoring Maths Team
- Reviewed by
- Success Tutoring
- Last reviewed
- 1 October 2026
- How it was made
- Generated by checked procedures
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