Triangle and Quadrilateral Angles
aligned to Demonstrate That The Angle Sum Of A Triangle Is 180â° And Use This To Find The Angle Sum Of A Quadrilateral
Learning Objective
I can determine the angle sums of triangles and quadrilaterals.
Lesson Flow
Watch Video
Basics of Triangles and Quadrilaterals
Miacademy & MiaPrep Learning Channel
Guided Notes
Key concepts students will learn:
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A triangle is a shape with three sides and three angles, and the sum of its interior angles is always 180 degrees.
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Triangles can be classified by their angles (right, acute, obtuse) or by their sides (equilateral, scalene, isosceles).
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The sum of the interior angles of a quadrilateral is 360 degrees, which can be shown by dividing it into two triangles.
Practice
12 questions • Multiple choice & Short answer
Exit Ticket
“One angle of a triangle measures 30°. Another angle measures 80°. What is the measure of the third angle?”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
