- MTH 338 Homework #3#6 PQ perpendicular to the tangent line at the point of tangency#11 Prove that the perpendicular bisectors of a cyclic quadrilateral are concurrent if and only if the quadrilateral is cyclic.#16 The three excircles of trian...#22 Prove if two circles are orthogonal, then they intersect at exactly two points and their tangents are perpendicular at both of those pointsPlayfair's postulate is logically equivalent to the statement: If a line intersects one of two parallel lines, then it also intersects the otherEuclid's fifth postulate is logically equivalent to the statement: If t is a transversal to l and m, l parallel to m and t perpedicular to l, then tis perpendicular to m

# MTH 338 Homework #3

- Author:
- Bill OConnell

Homework 3 #6, 11, 16, 22
Equivalence to Euclid's 5th postulate.