No, but it can have 1, 2 or 4 ninety degree angles.
A quadrangle with all sides equal and no 90 degree angles is a rhombus
Such a quadrangle cannot exist. If the quadrangle's angles are equal, they must be 90 degrees.
If two lines intersect each other forming 90 degree angles then they are perpendicular lines.
Any quadrangle with two opposite angles which are 90 degrees.
When who lines are perpendicular, this means the lines cross to make 4 90 degree angels.
a trapezoid
A rhombus (like a diamond), or a parallelogram.
Complementary angles are 90 degree angles while supplementary angels are 180 degree angles.You remember it by how complementary angle are 90 degrees more to get a supplementary angles.
rectangle
90 degree angles.90 degree angles.90 degree angles.90 degree angles.
Unless it is a religious triangle it does not have to have any angels! Seriously, though, a triangle does not have to have a 90 degree angle. In terms of its angles, the only requirement is that the measures of the three angles adds to 180 degrees (or pi radians).
The simple answer would be 90 Degrees as there are 360 degrees in a circle. If you have 4 equal angels.