Geometry in Pictures Book 3 is the tenth book in the series, covering the properties of circles with proofs, including the symmetry, tangent and angles properties. Proving and applying the formulae for the area of a scalene triangle, the sine rule and the cosine rule. Applying trigonometry to calculate angles of elevation and depression, and in various triangles. Trigonometry in there dimensions. Defining the trigonometry ratios for any angle, comparing graphs and solving trigonometry equations. Combining translations, rotations and reflections.

There are galleries where appropriate. Review questions are at the end of each section.

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