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

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.