Author note — to cover

Three matched sides guarantee congruence: check the correspondence, write it in matching vertex order, and explain why no angle information is needed. Marked diagrams and worded side lists both appear. Choosing between the four criteria is the Proving two triangles congruent page. Both tiers. (G5)

• Fluency — direct questions on congruence by sss, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).