CCSS 8.G.B.7 Worksheets

Grade 8 · Geometry

Apply the Pythagorean theorem to find unknown side lengths of right triangles in real world and mathematical problems.

Below are free printable worksheets that support 8.G.B.7. Print them as PDFs, or generate a fresh one. Every math answer key is computed in code, so it is never wrong.

Teaching guide

What students learn

Apply the Pythagorean theorem to find unknown side lengths of right triangles in real world and mathematical problems.

How to teach it

Sort and name 2D and 3D shapes by their properties (sides, angles, faces), then build up to perimeter (add the sides) and area (cover with unit squares).

Worked example

Rectangle 2 cm by 15 cm. Area = ___ sq cm

Answer: 30

Generated and checked in code, so it is correct.

Watch out for

Confusing perimeter and area, and judging a shape by its orientation rather than its properties.