Triangle Sum Theorem Digital Activity

5.0(1 ratings on TPT)
$3.99
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  • Instant download after purchase
  • Answer keys included
  • One-teacher classroom license
Grades:
8th
Standards:
8.G.A.5
Format:
PDF (print), Google Sheets

This 8th-grade digital pixel art activity helps students master the triangle sum theorem through self-checking practice. Two levels let students solve for missing angles or set up equations to find x. Perfect for fall, Halloween, or Thanksgiving, mystery images keep students engaged. Instant feedback with green correct answers and red incorrect ones. Aligns with CCSS.8.G.A.5. Includes printable worksheets. Ideal for spiral review, homework, or independent practice.

About this resource

Make practicing angle sum and triangle sum theorem practice a blast with this self-checking digital pixel art activity. Includes 2 Google Sheets with 24 questions total to practice angles in a triangle. Each correct answer reveals part of two mystery image perfect for fall, Halloween, Thanksgiving, autumn or any time in the school year. Plus, there’s an optional printable PDF worksheet to show work on paper if desired.

These self-checking Google Sheets give students instant feedback. Incorrect answers are highlighted in red, and correct answers turn green and unlock parts of a mystery picture. They’re easy to assign, keep students engaged, and free up your time for differentiation.

CCSS Standards: 8.G.A.5

Great to pair with parallel lines cut by a transversal pixel art activity! This activity is differentiated, one level contains easier problems where students solve for the missing angle in the triangle, while the second level contains more complex problems where students have to set up equations with variables to find x.


What's included:

  1. Instructions. Know how to assign both with and without Google Classroom.
  2. Pixel Art Google Sheet #1. Triangle Sum Theorem (Find the missing angle)
  3. Pixel Art Google Sheet #2. Triangle Sum Theorem (Solve for x)
  4. Work Space. Optional PDF worksheets that students can use to solve math problems on paper first before typing them in.
  5. Answer Keys. Included for all activities.

Great for…

  • Spiral Review Lessons
  • Emergency Sub Plans
  • Homeschool Activities
  • Homework & Independent Practice
  • Learning Centers & After School Math Programs

Reviews for my Pixel Art products…

⭐⭐⭐⭐⭐ Kristy M. - ”My students love mystery pixel art activities and ask for them all the time! This is a great skill practice and students become more independent when using these.”

⭐⭐⭐⭐⭐ Teresa G. - “Great review resource for the beginning of unit, then harder level 2 practice as we moved along, self-checking pixel art helps so much!”

⭐⭐⭐⭐⭐ Carissa S. - “My students love being able to go online to learn once each week! This resource provided much needed additional practice! And my students loved it and were highly engaged.”


A reminder about Google Drive products:

This is a Google Drive product. You and your students will need Google or Google Classroom accounts to access this resource.

After purchase, you'll access the resource via Google Drive:

  • TPT will request your permission to access your Google Drive. This is a standard permission process required by any website or platform that integrates with Google Drive.
  • TPT will make a copy of this resource and add it to your Google Drive.
  • The resource will be located in a folder in your Google Drive named "TPT Purchases."

Learn more about Google Drive products on the TPT knowledge base.


Something not right?

If you have a question, or something is off with the lesson, please email me or post a question on TPT. I’ll do everything I can to make it right.


License

Each license of this product is for one teacher’s classroom and their students. If you wish to share with other teachers, please purchase additional licenses.

Copyright © 2025 Congruent Math LLC. All rights reserved.

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