Perimeter – Self-Checking Geometry Activity for Polygons & Right Triangles

Perimeter Dominos is a domino-style activity for geometry students on finding the perimeter of polygons and right triangles. Students solve for each perimeter, then match the problem to its correct answer. When everything is matched correctly, all the dominoes connect in a full loop, so the activity is self-checking.

What’s included

• 12 printable domino cards with perimeter problems and matching answers
• Teacher notes with setup instructions and differentiation ideas
• Answer key for easy checking
• Suggestions for use as a geometry station, warm-up, sub plan or early finisher activity

Skills covered

• Finding the perimeter of rectangles, squares and compound shapes
• Applying the Pythagorean Theorem to find missing side lengths
• Working with square roots and right triangles
• Developing logical reasoning through matching and sequencing

How to use it

Setup is easy: print, cut and go. The activity is low prep and works for classwork, stations or review days.

It is hands-on, so students are moving cards and thinking while they work on perimeter, problem solving and visual reasoning. The self-checking loop holds them accountable for accurate answers.

Quick facts

• Skill: perimeter of polygons and right triangles
• Grades: 8–10
• CCSS: 7.G.B.6, HSG-GPE.B.7, HSG-GMD.A.1
• Answer key: included

Bundles and related resources

Perimeter Dominos can be found in my High School Geometry Unit on Area.

Free resources

Get my free Warm Up Slides templates.

Terms of use

By purchasing this product, you own a license for one teacher only for personal use in their own classroom. Licenses are non-transferable and therefore can not be passed from one teacher to another. If the teacher who purchased this license leaves the classroom or changes schools, the license and materials leave with that teacher. No part of this resource is to be shared with colleagues or used by an entire team, grade level, school or district without purchasing the correct number of licenses. If you are a coach, principal or district interested in transferable licenses that would accommodate yearly staff changes, please contact me for a transferable license quote at lindsay@beyondtheworksheet.com.

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