Topic:
Space, measurement and applications of trigonometry
Weeks
13–18 Units of measurement of length, angle, area, volume and capacity. Exact and approximate answers, scientific notation, significant figures and rounding. Application of trigonometry to right-angled triangles (Pythagoras' theorem and trigonometric ratios), including angles of elevation and depression and true bearings, sines and cosines of angles up to 180°. Review of mensuration and solving problems using practical applications of trigonometry involving
perimeter and area of both standard and composite two-dimensional shapes including arc lengths and sectors. Practical situations involving quadrilaterals, circles and composite shapes including arcs and sectors.
Length, surface area and volume problems involving three-dimensional objects and their composites. Applications of Pythagoras' theorem in three dimensions.
Application of trigonometry to non-right-angled triangles including length (sine rule including the ambiguous case, cosine rule), area (three standard rules),
surface area and volume and practical problems involving three-dimensional objects and their composites (includes Pythagoras in three dimensions). Similarity of shapes and solids and applications, the effect of linear scale factor on lengths, areas and volumes. Sample learning activity:
Planning a house and land package Sample mathematical investigation: Tent size and guy rope length |