Solving for Sides with Pythagorean Theorem
Free to teach as-is — the teacher guide, student handout, and slides are included.
Free — we'll email you an access link. Google Docs format.
Objective
I can apply the Pythagorean Theorem to solve for missing side lengths of right triangles.
Part 1 of 4
Warm-up video
Professor Dave Explains · 5:02Vetted channel
We don't generate video — this one is by Professor Dave Explains on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
The Pythagorean Theorem applies to right triangles, relating the lengths of its sides.
- 2
In a right triangle, the sides that form the right angle are called legs, and the side opposite the right angle is called the hypotenuse.
- 3
The Pythagorean Theorem is expressed as the equation a² + b² = c², where a and b are the legs and c is the hypotenuse.
Part 3 of 4
Practice
10 questions
In a right triangle, which side is opposite the right angle?
State the Pythagorean Theorem formula.
Part 4 of 4
Exit ticket
Quick comprehension check
“A right triangle has a hypotenuse of length 10 and one leg of length 6. What is the length of the other leg? Show your work.”
Sample answer included in the free materials
Get the materials
Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
Complete lesson plan with answer keys and alternate activities
Student Handout
Printable worksheet
Slides
Ready to present
We'll ask for your email to send your access link — nothing else.
Teaching a group at a different level?
Where are your students right now? We'll rebuild this lesson to match — including the teacher guide, student handout, and slides, saved to your Google Drive.
Adapt This Lesson

