How to do question 6?

Answer question above and explain each step : )

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.

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?