Instructions: Given the figure, what is the angle of rotational symmetry?

What is the value of x when x + 7 = 21?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?