# Measurement and Geometry

Students solve problems involving surface area and volume of right pyramids, right cones, spheres and related composite solids, prove and apply angle and chord properties of circles and use Pythagoras' theorem and trigonometry to solving three dimensional problems in right-angled triangles. They establish the sine, cosine and area rules for any triangle and solve related problems, use the unit circle to define trigonometric functions and graph them and solve simple trigonometric equations.