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Listed under:  Mathematics  >  Geometry  >  Angles  >  Acute angles
Video

Right angle or acute angle?

What's the difference between a right angle and an acute angle? Find out!

Online

TIMES Module 9: Measurement and Geometry: introduction to plane geometry - teacher guide

This is a 16-page guide for teachers. It provides an introduction to the initial ideas of plane geometry. Points and lines are introduced as fundamental objects in the study of geometry. Angles and parallelism are the initial areas of attention in a more formal approach to geometry that occurs from year 7.