7. Given RS and TV bisect each other at point x. TR and SV are drawn Prove: TR = SV

In Hilbert plane, prove that the interior of a circle is convex. Hint: Prove first that if any ABC is a triangle and X is between A and B then either AX < AB or AX < AC. You may use propositions 2 - 27from book 1of Euclid.

10. Line in the xy-plane contains points from each of the Quadrants I, III, and IV, but no points from Quadrant II. Which of the following must be true? A) The slope of line B) The slope of line C) The slope of line D) The slope of line is zero. is undefined. is positive. is negative.