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0. Revision of Right Angled Triangles
0. Revision of Right Angled Triangles
Right angled triangles are a special case of trigonometry, where there is a right angle (90 degrees) somewhere in the triangle. This makes calcualations straightforward. We will review this idea breifly, but will move on to non-right-angled triangles quickly.
Pythagoras
Pythagoras
Pythagroas' theorem links side lengths in right-angled triangles.
Khan Academy Explanation
Right Angled Trigonometry
Right Angled Trigonometry
Credit: https://thirdspacelearning.com/us/math-resources/topic-guides/geometry/sohcahtoa/
1. Sine rule
1. Sine rule
Law of sines examples: finding sides
Law of sines examples: finding angles
Proof of Law of Sines
2. Law of Cosines
2. Law of Cosines
Finding sidel engths
Fidning Angles
Proof of Cosine Rule
4. Area of a non-right angled triangle
4. Area of a non-right angled triangle
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