HELP NEEDED

WORTH 12 POINTS

~~~PLEASE HELP~~~

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.

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.