I can discover the relationship between the sides of a right angled triangle Form IV Starter a) Find the missing length Extension - find the length of the diagonal in this 3D shape Solutions Trig ratios We know how to find the size of a missing length in a right angled triangle if we know the length of the two other sides. However, what if we only know the length of one side, but we know the size of one of the angles? Investigation Attempt the investigation in the uploaded google document on trigonometric ratios. What you discover in this investigation will help you with questions like on the previous slide. Exit ticket Describe what you have discovered about the relationship between the sides of a right angle as a result of your investigation?