Check the given quadrilateral $\mathrm{EFGH}$ is a convex quadrilateral?

Write answer as Yes / No.

Draw  both the  diagonals of the quadrilateral $\mathrm{EFGH}$. Do they intersect each other?

Draw the both diagonals of the quadrilateral $\mathrm{TU}VW$. Do they intersect each other?

Consider a concave quadrilateral $\mathrm{ABCD}$. What is the sum of interior angles of a concave quadrilateral? Write the answer in degree $\left(°\right)$.

In quadrilateral $PQRS$, name the sides, angles, vertices and diagonals.

In quadrilateral $PQRS$, name all the pairs of adjacent sides, adjacent angles, opposite sides and opposite angles.