Triangle Angles Add Up to 180
Grade 4 · Math · 45 min· 5.mg.3 The Student Will Classify And Measure Angles And Triangles, And Solve Problems, Including Those In Context.
What's Included
Learning Objective
I can prove that the angles inside a triangle add up to 180° using models and find a missing angle in a triangle.
Warm-Up Video
Khan Academy · 4:28
Proof: Sum of measures of angles in a triangle are 180 | Geometry | Khan Academy
Practice Questions
7 questions · Short answer
Exit Ticket
Quick comprehension check
“A triangle has angles measuring 60° and 75°. What is the measure of the third angle? A triangle has angles measuring 90° and 20°. What is the measure of the third angle? ”
Complete Lesson Package
Get all 3 ready-to-use resources:
Teacher Guide
Student Doc
Slides
