standard_description: Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.
problem_activity: Stage 2: Subtract within 10
Required Preparation
Materials to Gather
Colored pencils or crayons
Number cards 0–10
Materials to Copy
Blackline Masters
Capture Squares Stage 2 Gameboard

Narrative
Students choose two cards and find the difference.


aligns: no