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Geometry (Part 1) Lines and angles
the lines are perpendicular. Symbol for ‘perpendicular’ Mathematics Grade 8 3 Exercise 1: (a) In the diagram below name: (1) 5 acute angles (2) 2 right angles (3) 10 pairs of adjacent angles (4) 3 obtuse angles (b) In the diagram below, classify the angles labelled a – j. The first one is done for you as an example:
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