suppose i am using t-distriubution to estimate or test the mean of a sample from a single population. if the sample size is 25, then the degrees of freedom

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

Complete the truth table a. t, f, f, t b. t f f f c. f t f t d f t f t

What is the missing step in this proof ?