Which of the following best describes a basic postulate of euclidean geometry? a. all straight line segments have a midpoint. b. any straight line segment can be extended indefinitely. c. all right angles are formed from perpendicular segments. d. any two right angles are supplementary.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.