Geometry: Angle sum of a triangle

Reason For Learning

To develop an understanding of the angle properties of triangles. A deep understanding of triangles is an essential basis for Pythagoras’ Theorem and trigonometry.

Learning Intention

The interior angles of a triangle add to 180˚. To use this information to calculate unknown angles in triangles. Only skills-based problems will be covered in this Learning Bite.

Key Vocabulary Terms

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    ACMMG166 Level 7

    Demonstrate that the angle sum of a triangle is 180° and use this to find the angle sum of a quadrilateral