Part A: Explain how you know the right triangles are similar Part B: Write a ratio that is equivalent to z/x

Part C: Which ratios of side length are equal to tan(a)

Part D: Explain why the values of the trigonometric ratios only depend on the angle and not on the particular lengths x, y,z, q,r, s

Part E: If y/z=O.7, what is the measure of to the nearest degree?