WorksheetYear 9Level 1 · Easier

Free Year 9 Pythagoras' Theorem Worksheet — Level 1

Find the hypotenuse or a shorter side of a right-angled triangle. Builds confidence with the core skill before adding complexity. This Year 9 worksheet has 8 questions and comes with a full answer sheet showing the working for every question.

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Year: Year 9
Subject: Mathematics
Topic: Pythagoras' Theorem
Difficulty: Level 1 · Easier
Estimated time: 20 minutes
Curriculum: England National Curriculum
Questions: 8
Answers: Included, with working
Format: PDF (A4) + print

Students will practise

finding the hypotenuse
recognising Pythagorean triples
rounding to decimal places

Curriculum: England National Curriculum. We show specific outcome codes only where they have been verified against the official curriculum document.

What's next?

Completed: Year 9 Pythagoras' Theorem Worksheet — Level 1

1Year 9 Trigonometry (Finding Sides) Worksheet — Level 1

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?

Year 9 students (typically ages 14–15) working on pythagoras' theorem. It is pitched at level 1 · easier.

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?

Try Year 9 Trigonometry (Finding Sides) Worksheet — Level 1.

Year 9 · Mathematics · Pythagoras' Theorem

Year 9 Pythagoras' Theorem Worksheet — Level 1

Success Tutoring

Student name:

Date:

Score: /

Use c² = a² + b², where c is the hypotenuse. Show your working.

1.A right-angled triangle has shorter sides of 8 cm and 15 cm. Find the length of the hypotenuse.

2.A right-angled triangle has shorter sides of 7 cm and 24 cm. Find the length of the hypotenuse.

3.A right-angled triangle has shorter sides of 12 cm and 16 cm. Find the length of the hypotenuse.

4.A right-angled triangle has shorter sides of 15 cm and 20 cm. Find the length of the hypotenuse.

5.A right-angled triangle has shorter sides of 6 cm and 8 cm. Find the length of the hypotenuse.

6.A right-angled triangle has shorter sides of 9 cm and 12 cm. Find the length of the hypotenuse.

7.A right-angled triangle has shorter sides of 20 cm and 21 cm. Find the length of the hypotenuse.

8.A right-angled triangle has shorter sides of 9 cm and 40 cm. Find the length of the hypotenuse.

Preview — the PDF contains the full resource and answer sheet.

Pythagoras' Theorem in other year levels

Year 10 Pythagoras' Theorem Worksheet — Level 3
Worksheet · Year 10 · Pythagoras' Theorem · Level 3 · Challenge

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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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