Congruence Clash

Rigid transformations, SSS, SAS, ASA, AAS and HL, CPCTC proofs and constructions. Claim four in a row.

Geometry4-in-a-row1–6 players or teamsNo student loginsWorks offline

Try it free with your class: the demo runs right in your browser for 8 questions. No sign-up needed.

Or get every game, including all future games, with the All-Access Teacher License for $150.

What students practice

Rigid transformations, triangle congruence (SSS, SAS, ASA, AAS, HL), CPCTC and two-column proofs, isosceles triangles, parallelograms, constructions

OAS G.RL.1.1 · G.2D.1.5, 9, 11

Common Core: HSG-CO.A.2–5 · HSG-CO.B.6–8 · HSG-CO.C.9–11 · HSG-CO.D.12

Open the game file in any web browser: Chromebooks, laptops or your smartboard. No accounts, no student logins and no internet needed once it's downloaded.
Enter the players or teams, then press Start.
Students take turns on one shared screen, so the whole class can play together on a projector or smartboard.
Each purchase includes the game file and a one-page Quick Start guide.