Revision Topic 20: Sine and Cosine Rules and 3D Trigonometry

This type of triangle is also isosceles. Rules for the 45-45-90 Right Triangle: If given one of the legs, multiply one leg by √2 to find the hypotenuse. If given the length of the hypotenuse, divide by √2 to find the value the legs. Rules for the 30-60-90 Right Triangle: ................
................