Pythagorean Theorem and Right Triangles
Grade 9th Grade · Math · 45 min
What's Included
Learning Objective
I can apply the Pythagorean Theorem to find the missing side length of a right triangle.
Warm-Up Video
Kristen Watson · 4:00
Pythagorean Theorem
Guided Notes
3 key concepts
- 1
The Pythagorean Theorem can only be used to find the missing side length of right triangles.
- 2
The formula for the Pythagorean Theorem is a² + b² = c², where 'c' always represents the hypotenuse, which is the side opposite the right angle.
- 3
When finding a missing leg, you'll need to subtract the known leg squared from the hypotenuse squared before taking the square root to find the missing side length.
Practice Questions
11 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“A right triangle has a hypotenuse of 17 cm and one leg that is 8 cm long. Find the length of the other leg. Show all work.”
Complete Lesson Package
Get all 3 ready-to-use resources:
