Which of the following correctly shows clustering for the problem 72 x 13? 72 x 10 + 72 x 3
72 x 12 + 72 x 1
70 x 10 + 2 x 3
72 x 10 + 72 x 13

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false