Usually none but it's quite possible for it to have two.
There are 3 different types: ordinary, isosceles and right which has 2 right angles
No.
720 degrees * * * * * The internal angles of any quadrilateral add to 360 degrees.
4 right angles, no other angles.
Letter L unless you count the ends as additional sides An irregular quadrilateral, such as certain trapezium. should that be trapezia or trapeziums?
There are 3 different types: ordinary, isosceles and right which has 2 right angles
No.
720 degrees * * * * * The internal angles of any quadrilateral add to 360 degrees.
Many shapes have a right angles. For example, a right angled triangle, square or rectangle all contain at least one right angle. Trapeziums may also contain right angles. Any irregular polygon may also contain a right angle.
4 right angles, no other angles.
Letter L unless you count the ends as additional sides An irregular quadrilateral, such as certain trapezium. should that be trapezia or trapeziums?
It has 6 angles, none of which are right angles.
0 right angles
A regular hexagon as no right angles. An irregular hexagon could have from none to as many as five right angles.
a tetrahedron has 3 Right angles
A square has 4 right angles.
4 right angles