Angles in Triangles Lesson

Angles in Triangles Lesson
Angles in Triangles Lesson
Angles in Triangles Lesson
Angles in Triangles Lesson
Angles in Triangles Lesson
Angles in Triangles Lesson
Angles in Triangles Lesson
Angles in Triangles Lesson
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3 MB|6 student pages + complete solutions
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  1. This is Unit 4 in my Geometry curriculum. This NO PREP unit bundle will help your students understand angles in triangles, triangle congruence shortcuts, congruent triangles proofs, and isosceles and equilateral triangles.Lessons Included: 4.1 Classifying Triangles4.2 Angles in Triangles4.3 Congrue
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Product Description

In this lesson, students will learn about the Triangle Sum Theorem and the Exterior Angle Theorem. This NO PREP lesson has a warmup, notes, homework, and a challenge worksheet.


  • Warm-Up - The warm-up is a review of classifying triangles.
  • Guided Notes - Two versions are included: mostly complete and fill-in-the-blank. The notes are 2 pages long. Examples are included throughout.
  • Homework - The homework is 2 pages.
  • Challenge Worksheet - The one-page challenge worksheet has six problems.
  • Answer Keys - Completely worked out answer keys are included.

Make sure this lesson is appropriate for your students - see the preview to see some of the pages in the product.

This is a lesson from Unit 4 - Congruent Triangles in my Geometry curriculum.

4.1 Classifying Triangles

4.2 Angles in Triangles

4.3 Congruence and Triangles

4.4 Congruent Triangles: SSS and SAS

4.5 Congruent Triangles: AAS, ASA, and HL

4.6 Congruent Triangles: CPCTC

4.7 Isosceles and Equilateral Triangles

Related Products

Classifying Triangles Interactive Notebook Pages

Angles in Triangles Foldable

Angles in Triangles Stations Maze

Exterior Angle Theorem and Triangle Sum Theorem Task Cards

Triangle Congruence Proofs Cut and Paste Activity

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Purchasing this product grants permission for use by one teacher in his or her own classroom. This item is bound by copyright laws and redistributing, editing, selling, or posting this item (or any part thereof) on the Internet are all strictly forbidden. If you wish to share with colleagues, please purchase additional licenses.

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Total Pages
6 student pages + complete solutions
Answer Key
Teaching Duration
50 minutes
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