Right Triangle Trigonometry Worksheet: 3-4-5 Triangle — Grade 10
Grade 10 right triangle trigonometry practice on 3-4-5 triangle. Five tasks with matching answers, teacher guidance, and Letter/A4 printing. Save as PDF from the print window.
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Page layout
0 practice pages · 0 answer pages. Pages are added automatically when needed. Question content and answer keys stay together.
Ready to teach
Ages 15-16 · About 30 minutes · Independent practice
- What students will do
- Choose and interpret trigonometric ratios using a stated reference angle.
- Age and response support
- Read the short model first. Allow oral rehearsal, then request a calculation, text detail, or explicit criterion appropriate to the task.
- Before assigning
- Print student pages separately from answers. Read the scenario and model assumptions before assigning. No external account, equipment, or audio is needed.
- Materials
- Pencil
Continue this learning sequence
Right Triangle Trigonometry Worksheets for Grade 10 →Independent activity · About 30 minutes · Pencil
About this practice
Grade 10 · Mathematics · Matching answer key included · US Letter and A4
Choose “Save as PDF” in your browser’s print window to keep a copy.
Teaching guide, sample answers and curriculum references
Before you begin
Read or listen to the model and identify what the task asks before responding.
How to use this worksheet
- Find sin θ as a fraction.
- Find tan θ as a fraction.
- If every side doubles, do these ratios change? Justify.
A common mistake to discuss
Both numerator and denominator double, so every ratio stays the same.
What to practice next
Create a different example that preserves the learning goal, and explain how you would check it.
Published 2026-10-23; updated 2026-10-23. Read our editorial policy.
Continue practicing
Choose a Right-Triangle Ratio: Club Practice
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Choose a Right-Triangle Ratio: Club Practice. Grade 10 printable practice: Choose and interpret trigonometric ratios using a stated reference angle. Includes five tasks, matching answers, and teacher guidance. Print on US Letter or A4, or save as PDF from the print window.
Choose a Right-Triangle Ratio: Library Practice
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Choose a Right-Triangle Ratio: Library Practice. Grade 10 printable practice: Choose and interpret trigonometric ratios using a stated reference angle. Includes five tasks, matching answers, and teacher guidance. Print on US Letter or A4, or save as PDF from the print window.
Choose a Right-Triangle Ratio: Workshop Practice
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Choose a Right-Triangle Ratio: Workshop Practice. Grade 10 printable practice: Choose and interpret trigonometric ratios using a stated reference angle. Includes five tasks, matching answers, and teacher guidance. Print on US Letter or A4, or save as PDF from the print window.
Right Triangle Ratios and Similarity: Apply and Create
Apply · Independent · 25 min
Identify sides relative to an acute reference angle. Calculate ratios and corresponding lengths. Justify complementary-angle relationships and apply a ratio. A focused apply activity. Use the linked unit for the learning sequence and teaching guide.