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Discovering triangle congruence shortcuts

In this lesson sequence, students will work in pairs using construction to test ‘shortcuts’ to use when proving triangles congruent.

Additional details
Year level(s)	Year 8
Audience	Teacher
Purpose	Teaching resource, Student task
Format	Web page
Teaching strategies and pedagogical approaches	Explicit teaching
Keywords	congruent, quadrilateral, side, angle, triangle, transformation, plane shape
Curriculum alignment
Curriculum connections	Critical and creative thinking, Numeracy
Strand and focus	Space
Topics	Angles and geometric reasoning
AC: Mathematics (V9.0) content descriptions	AC9M8SP01 Identify the conditions for congruence and similarity of triangles and explain the conditions for other sets of common shapes to be congruent or similar, including those formed by transformations AC9M8SP02 Establish properties of quadrilaterals using congruent triangles and angle properties, and solve related problems explaining reasoning
Numeracy progression	Understanding geometric properties (P6, P7) Proportional thinking (P6)
Copyright details
Organisation	BetterLesson
Copyright	© Jessica Uy. Creative Commons BY-NC 4.0.