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Paper, pencil and protractor
In this activity, students are asked to construct triangles with a given set of restrictions. This can be done as a group activity. After completing the constructions, students are asked to explain their findings.
|Teaching strategies and pedagogical approaches
|Angle, Construction, Triangle, Side, Congruent
|Critical and creative thinking
|Strand and focus
|Angles and geometric reasoning
|AC: Mathematics (V9.0) content descriptions
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
Establish properties of quadrilaterals using congruent triangles and angle properties, and solve related problems explaining reasoning
Understanding geometric properties (P6, P7)
Proportional thinking (P6)
© 2014 The Australian Association of Mathematics Teachers (AAMT) Inc. Free-for-education material.