Pythagorean Theorem Reference Sheet
Written by Adi Ackerman, Head Teacher
"Pythagorean Theorem Reference Sheet" is written for 8th Grade (Ages 13-14), and it covers Common Core 8.G.B.7. It also works a grade below or above, as a tool for a student who is ready for it or a quick refresher for an older one.


8th grade math resource: a squared plus b squared equals c squared with worked examples for the hypotenuse, a leg and the converse. Part of our using the Pythagorean theorem collection. Aligned to Common Core standards.
How do I use this resource?
Start with the reference sheet and the hypotenuse and leg drills, then move to mixed practice and word problems. Use the proof and converse sheets to deepen understanding, and the code breaker for review.
What students will practice
- Students will review the parts of a right triangle and a² + b² = c².
- Students will follow worked examples that find a hypotenuse and a missing leg.
- Students will see how the converse sorts sides like 9, 12, 15 and 5, 6, 8.


Pythagorean Theorem, Find the Hypotenuse


Pythagorean Theorem, Find a Missing Leg


Pythagorean Theorem Mixed Practice


Pythagorean Theorem Word Problems


Pythagorean Triples, Spot and Scale Them


Pythagorean Theorem in Rectangles and Rhombuses


Pythagorean Theorem in Three Dimensions


Prove the Pythagorean Theorem With Square Areas
Curriculum Links
Common Core State Standards
Geometry · 8th Grade
Standard: Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions.
View all 8.G.B.7 worksheets →Find this in the curriculum
Browse the grade, subject, and topic this belongs to.
FAQ
How do I use the Pythagorean Theorem Reference Sheet?
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Start with the reference sheet and the hypotenuse and leg drills, then move to mixed practice and word problems. Use the proof and converse sheets to deepen understanding, and the code breaker for review.
What is the Pythagorean Theorem Reference Sheet?
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A squared plus b squared equals c squared with worked examples for the hypotenuse, a leg and the converse.
Can I use the Pythagorean Theorem Reference Sheet at home and in the classroom?
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Yes. We made it for 8th Grade Pythagorean theorem, and it works the same at home or at school. At home a student can print it and keep it with their school work. Teachers print a copy per student or one for the whole room, whichever the day needs.
How do you find the hypotenuse of a right triangle?
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Square both legs, add them and take the square root. With legs of 12 ft and 5 ft, 144 + 25 = 169, so the hypotenuse is 13 ft. Pythagorean Theorem, Find the Hypotenuse has eight triangles.
What is a Pythagorean triple?
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It is a set of three whole numbers that fit a² + b² = c², such as 8, 15, 17. Multiples of a triple, like 9, 12, 15, are triples too. Pythagorean Triples, Spot and Scale Them asks students to test twelve sets.
How can you prove the Pythagorean theorem?
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One proof places four copies of a right triangle inside a square with side a + b in two ways. Setting the two area expressions equal leaves a² + b² = c². Prove the Pythagorean Theorem With Square Areas guides each step.
How do you use the Pythagorean theorem in three dimensions?
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Find the diagonal of the bottom face first, then use it as a leg with the height to find the space diagonal. Pythagorean Theorem in Three Dimensions practices this with boxes and a cone.
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Worksheet Details
| Grade | 8th Grade |
| Subject | Math |
| Topic | Pythagorean Theorem |
| Standard | 8.G.B.7 |
| Pages | 1 page |
| Difficulty | Medium |
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Pythagorean Theorem, Find the Hypotenuse


Pythagorean Theorem, Find a Missing Leg


Pythagorean Theorem Mixed Practice


Pythagorean Theorem Word Problems


Pythagorean Triples, Spot and Scale Them


Pythagorean Theorem in Rectangles and Rhombuses


Pythagorean Theorem in Three Dimensions


Prove the Pythagorean Theorem With Square Areas