Literacy Research Memory Skill Practice Stretch! Remember: angle of depression is down and elevation is up. Research the use of a theodolite. Angle of Depression Angle of Elevation Skill Practice Stretch! A rocket is fired at an angle of elevation of 62°. It travels at a speed of 200 metres per second. a) How long will it take to reach a height of 20 000 metres? Give your answer to the nearest second. b) How far will the rocket have travelled? Give your answers to the nearest metre. A bird is sitting on top of a telegraph post. The post is 12 metres high. The bird sees a worm in the ground. The angle of depression from the bird is 50°. a) Calculate the distance of the worm from the bottom of the telegraph post. b) How far is the bird from the worm?