protractors

This is a level 4 measurement activity from the Figure It Out theme series.

This is a level 4 measurement strand activity from the Figure It Out series.

This is a level 4 geometry strand activity from the Figure It Out series.

This is a level 4 geometry strand activity from the Figure It Out series.

This is a level 4 geometry strand activity from the Figure It Out series.

This is a level 4 geometry strand activity from the Figure It Out series.

This is a level 3 geometry activity from the Figure it Out series.

This unit explores the magnitudes of sides and angles of a triangle and leads to the discovery and proof of the Cosine Rule. This Rule is then used to solve triangles, some of which arise in practical situations. We note that the Cosine Rule is a generalisation of Pythagoras’ Theorem.

Note that this unit may contain more material than you need for some classes. You may want to choose from parts of this unit if you have not allotted 5 sessions on the Cosine Rule to your class.