triangle ABC is inscribed in the circle with center O, with orthocenter H. D is the point of symmetry with B through center O. Prove that quadrilateral AHCD is a parallelogram

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

What is the range for 31,39,29,34,37,24,36,33,34,28

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212