1. 20. Pythagoras’ theorem and trigonometry

2. Pythagoras’ theorem learning objectives:
understand, recall and use Pythagoras’ theorem in 2-D, then in 3-D problems
(20.1, 20.2, 29.1)
calculate he length of a line segment in a 2-D plane (20.3)
give an answer in the use of Pythagoras’ Theorem as √ (25.4)
calculate the length of a diagonal of a cuboid (29.1)
Reference Material
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3. Trigonometry learning objectives:
recall and use the trigonometric ratios to solve 2-D and 3-D problems
(20.4, 20.5, 29.1, 29.2, 29.9)
find the angles of elevation and depression (20.5)
understand the language of planes, and recognise the diagonals of a cuboid (29.2)
find the angle between a line and a plane (but not the angle between two planes or between two skew line) (29.2)
Reference Material
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4. Your turn