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.
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.
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?
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.
No, only squares and rectangles have four sides and four right angles (90 degrees). Parallelograms, trapeziums, kites, and rhombuses all have four sides, but they have different size angles.
a tetrahedron has 3 Right angles
A right angle is 90 degrees