Base of a triangle is 15 height is 7 what is area of triangle

Determine the relationship of ab and cd given the following points

Is the point (0, 8) on the x-axis or y-axis? how do you know?

The coordinates r(1, -3), s(3, -1) t(5, -7) form what type of polygon? a right triangle an acute triangle an equilateral triangle an obtuse triangle