3. Can a trapezium have all angles equal? Can it have all sides equal? Explain.
Trapezium has two sides parallel and other two sides are non parallel.Parallel sides may be equal or unequal but we cannot have a trapezium with all sides and angles equal.
A square is a trapezium. It has a pair of opposite sides parallel. It has four equal angles and equal sides. So a trapezium can have 4 equal angles and 4 equal sides.