Grade 8 Math Book · Shapes & Geometry
What's Your Angle, Pythagoras?
by Julie Ellis
Young Pythagoras is always asking questions. By noticing patterns in tiles and triangles, he discovers a rule about right triangles that solves real problems, like making sure a ladder reaches a window.
Why it's useful
A picture book that shows where the Pythagorean theorem comes from, perfect for grade 8.
- See it with squares. The squares on the two short sides add up to the square on the long side.
- Why it's useful. The story uses the rule to solve practical problems.
- Math as discovery. Students see a famous rule as something a curious person noticed.
Try it in class or at home
- Grid paper proof. Draw a 3-4-5 triangle and the squares on each side. Count the units.
- Find the ladder. How long a ladder reaches a 12-foot window from 5 feet away?
- Hunt for right angles. Use the 3-4-5 rule to check corners in the classroom.