Find the gradient of the line segment between the points (-5,-2) and (-3,-8)

Pick the description of a geometric object that best matches the real world object box for a deck of card

I'll give brainliest if you answer right : )

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.