Given ABCD as marked, what additional information would help you to prove that ABCD is a square? Pls I rlly need help

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.