Question

in this question why angle of depression 45' at AE is also same at BD

Answer 1

The main ratio that we use to find the angle of depression is tangent. The angle of depression may be found by using this formula: tan y = opposite/adjacent. The opposite side in this case is usually the height of the observer or height in terms of location, for example, the height of a plane in the air.

Hi , If you are looking at an object above the horizon then the angle between the horizontal and your line of sight is the angle of elevation. If you are looking at an object below the horizon then the angle between the horizontal and your line of sight is the angle of depression.

Answer 2

Answer:

Sponges, the members of the phylum Porifera, are a basal Metazoa clade as a sister of the Diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.