In which type of quadrilateral are consecutive angles congruent?

Quadrilateral includes: square, rectangle, parallelogram, trapezoid, rhombus, etc... anything with four sides basically. consecutive angles means the angles that are next to each other, so your computer screens bottom right and bottom left corners form consecutive angles. Congruent means equal. basically the question is asking which shape with four sides has two equal angles right next to each other, which could be a square, a rectangle, or a trapezoid(not an isosceles trapezoid).
So your answer is one of three, either Square, Rectangle, or Trapezoid.
Hope this helps.

21 is the answer the answer is 21