Exterior Angle Theorem Digital Pixel Art | Angles of Triangles Spring Math


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

Why you'll love this

Easy to assign virtual or in-person, and with Google Classroom.

Great to pair with triangle sum theorem and parallel lines cut by a transversal pixel art activities! 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.

Standards covered…

8.G.A.5 Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles.


✅ Pixel Art Google Sheet #1: Exterior Angle Theorem - One Step, solve for missing angle (12 problems)

✅ Pixel Art Google Sheet #2: Exterior Angle Theorem - Multi-Step, solve for x. (12 problems)

✅ Answer key.

✅ Instructions for use with Google Classroom and non-Google-Classroom platforms.

✅ Printable PDF worksheets for students to show work before typing into Google Sheets. (optional)

Great for…

⭐ Back-to-School, 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.”

Want to save 40%?

Consider a Pixel Art grade level bundle. It's a whole year of review or sub plans:

✴️ 6th Grade BUNDLE

✴️ 7th Grade BUNDLE

✴️ 8th Grade BUNDLE

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