What is the Grade 9 Pythagorean Theorem Quiz?
The Grade 9 Pythagorean Theorem Quiz is a free web app for practicing right-triangle problems in a quick 4-choice quiz format.
You can review the hypotenuse, missing legs, Pythagorean triples, coordinate distance, plane figures, solid figures, and short original word problems.
All questions, choices, explanations, and diagrams are independently created for this app. They are not copied from textbooks, workbooks, entrance exams, mock exams, official surveys, or commercial teaching materials.
Practice from basics to exam-style applications
The courses start with identifying the hypotenuse and using a² + b² = c², then move to missing sides, coordinate distance, plane figures, solids, and original word problems.
The quiz is not an official, authorized, supervised, or endorsed site of any ministry, board of education, school, publisher, cram school, prep school, or educational company.
Course lineup
- 10-question basic check
- 20-question hypotenuse practice
- 20-question missing leg practice
- 20-question Pythagorean triples
- 20-question coordinate distance
- 20-question plane figure applications
- 20-question solid figure applications
- 30-question mixed practice
- 50-question standard exam-style practice
- 100-question comprehensive challenge
Dynamic hints with original diagrams
The hint area changes with the current problem. It uses original SVG diagrams for right triangles, coordinate grids, plane figures, and solid figures.
Please check official sources for formal curriculum, school materials, entrance exam information, and test information. If there is any rights-related concern, please contact us through the inquiry form linked in the Japanese notice.
What you can practice here
This app is useful when you want to check whether you know which side is the hypotenuse, whether to add or subtract squares, and how to finish the calculation with a square root.
It also includes coordinate-plane distance and solid-figure diagonals, so learners can practice applying the same theorem in different-looking problems.
For teachers and families
Each round is short, making it suitable for warm-up practice, homework review, or quick test preparation. The ranking and My Page features make repeated practice easier to continue.
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