The area of a liberty townships square playground is represented by the trinomial x(to the power of 2) -10x+25. Write an expression using the variable x that represents the perimeter.

1. are the triangles similar and if so why? what is the value of x? show your work.

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

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 .