Need asap not sure how to do this plz

Which number is irrational? a) 16 b) 18 c) 25 d) 36

Which statement explains how you could use coordinate geometry to prove that quadrilateral abcd is a parallelogram? -5 -4 -3 -2 -1 t 1 2 3 4 prove that all sides are congruent and have slopes that are opposite reciprocals prove that segments ad and ab are congruent and parallel prove that opposite sides are congruent and have equal slopes prove that segments bc and cd are congruent and parallel

Hi my sisters and brothers can tell me the answer because i don’t understand the question