This is for calculus I need help on this please Please solve each part and show work for all parts thanks

Which of the following statements is not true? a. parallel lines are lines in the same plane that never intersect. b. congruent figures have the same shape and same size angles and sides. c. similar figures must have the same shape and the same size. d. a rotation is when you turn a figure around a certain point.

What is the difference between regular convex and concave polygons

Based on the figures as marked, /\rqs = —