Congruent Triangles & CPCTC Find Sides, Angles & Solve for x
by Making Algebra Fun by Angela Dougher © 2026
Premier Publisher
Price: $2 USD
Subjects: math,mathHighSchool,highSchoolGeometry,congruence
Grades: 9,10
Description
Students use congruence statements and CPCTC (corresponding parts of congruent triangles are congruent) to find missing sides, angles, and x with 15 self-checking digital task cards. Every answer is a whole number that students type in. Skills covered: - Matching corresponding sides and angles from a congruence statement - Finding missing side lengths and angle measures - Solving for x with corresponding sides - Solving for x with corresponding angles - Using the Triangle Angle Sum Theorem with congruent triangles - Perimeter of congruent triangles - Statements with the letters in a different order - Two-step problems: solve for x, then find the side or angle Cards progress from reading a congruence statement to algebra and two-step problems. The deck works for independent practice, homework, stations, review, and sub plans. Each card includes alt text for screen reader users. Questions and alt text were created with the help of AI (Claude by Anthropic) and reviewed by the author for accuracy.