Triangle Congruence Criteria
Lesson Prep
Lesson Details
Duration: 50 minutes
Learning Goal: Explore and develop understanding of what criteria is required for triangle congruence.
Prework
Make sure you have Chromebooks or some other class set of technology.
Answer Keys
Classwork
Exploration Activity (NCTM Illuminations)
Note: This activity may no longer be supported by modern web browsers. It is an activity with digital interactives that provide students with an opportunity to test and explore Triangle Congruence Theorems.
Reflection Handout / Notes (inspired by Jessica Uy)
Standards
Common Core
HSG.CO.B.7 – Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.
HSG.CO.B.8 – Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.
TEKS
G.4(C) – verify that a conjecture is false using a counterexample
G.5(A) – investigate patterns to make conjectures about geometric relationships, including angles formed by parallel lines cut by a transversal, criteria required for triangle congruence, special segments of triangles, diagonals of quadrilaterals, interior and exterior angles of polygons, and special segments and angles of circles choosing from a variety of tools