Please help solve…….

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Based on the figures as marked, /\rqs = —

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.