Identifying Right Triangles
Grade 9th Grade · Math · 45 min
What's Included
Learning Objective
I can classify triangles as right triangles based on the measure of their angles and the relationship between their sides.
Warm-Up Video
Math with Mr. J · 2:27
What is a Right Triangle? | Types of Triangles | Math with Mr. J
Guided Notes
3 key concepts
- 1
A right triangle is defined as a triangle that contains one angle that measures exactly 90 degrees.
- 2
Right triangles are classified based on their angles, and a box in the corner of a triangle typically represents a 90° angle.
- 3
A triangle can only have one right angle because the sum of all angles in a triangle must equal 180 degrees.
Practice Questions
11 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“A triangle has angles measuring 30°, 60°, and 90°. Is this a right triangle? Explain your answer.”
Complete Lesson Package
Get all 3 ready-to-use resources:
