Help please! Which of the following is required to construct the inscribed circle of a triangle?
A. the perpendicular bisectors of the sides of the triangle

B. the circumcenter of the triangle

C. the orthocenter of the triangle

D. the incenter

The function y= x - 4x+ 5 approximates the height, y, of a bird, and its horizontal distance, x, as it flies from one fence post to another. all distances are in feet. complete the square to find and interpret the extreme value (vertex). select two answers: one extreme value and one interpretation.