Which of these five polyhedra are prisms?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Which system of linear inequalities is represented by the graph?

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y