In parallelogram HIJK, the measure of angle H is 45°. Find the measure of angle J. Explain how you know.

Find the measure of angle K. Explain how you know.

Which of the following points is collinear with (-2,1) and (0,3)

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Find the value of x. give reasons to justify your solutions! l, m ∈ kn