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What is the mathematical definition of angle of depression?
Angle of depression is defined as the angle between the horizontal line and the line joining the observer's line of sight to an object below the observer's eye sight. You can be on top of a building and an object is situated on the ground, and the angle between your horizontal line and the object is the angle of depression.
What is the angle of depression?
The angle of depression is looking at an object below your line of sight.
Why are mirrors placed at 45 degree angle in a periscope?
so that light bounces off one to the other lets say you want to look up to see what is in front of you. If you look up at a angle that is completely vertical, that degree measurement would be 90*. the horizontal plane would be 0*. the angle in-between the two is 45*. so if you look up, at 90* at a mirror that is placed at 45* then you will see what ever is in the mirror at 0* in front of the mirror. If the mirror was at lets say 75* you would look up at the sky, if the angle was at 30* you would look at the water.
Does a cylinder have any vertices?
anything with angles does have vertices * * * * * The circular base of a cylinder meets the curved surface at an angle of 90 degrees. So there are an infinite number of angles, but not a vertex in sight. Something wrong with your statement, perhaps!
How do you find the height of a regular pyramid?
It depends on what information you do have - including whether or not it is symmetrical. If you don't have any information you can measure the height. If it is large enough and you cannot climb up it, you can measure its length, the angles made by the lines of sight to its top relative to the horizontal from two points on opposite sides of the pyramid and carry out some trigonometric calculations.
