∠abc and ∠def are supplementary.
m∠abc=138°
what is the measure of ∠def ?

42°
90°
138°
180°

If the discriminant if a quadratic equation is 4 which statement describes the roots?

Tamar is measuring the sides and angles of tuv to determine whether it is congruent to the triangle below. which pair of measurements would eliminate the possibility that the triangles are congruent

Line u passes through points (-52, -18) and (-29, 53). line v passes through points (90, 33) and (19, 56). are line u and line v parallel or perpendicular?