HELP ASAP PLEASE Which of the following statements are false?

I. Corresponding angles of similar figures are the same.
II. Corresponding sides of similar figures are the same.
III. Corresponding sides of congruent figures are the same.
IV. Corresponding angles of congruent figures are the same.

II
I and II
None
III

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.