It could be a square or a rectangle. Or you could call it a quadragon.
On octagon is a plane (2-dimensional) figure which has only one face. There are no right angles on the face of an octagon.
For any n-sided plane figure the interior angles total 2n - 4 right angles.
a triangle can have only one right angle because the sum of all the three angles of a triangle has to be 180. so if there are more than one right angles, the sum of the angles will exceed 180 and hence the plane figure will no longer be a triangle
If all of the angles add to 180 degrees the figure is a triangle. * * * * * That is if they form a plane figure. Angles that add to 1890 degrees are called supplementary angles.
a closed plane figure with all sides congruent and all all angles
They are possible - unlike plane triangles in which all of the angles are right angles, obtuse or larger.
This depends what the figure is referencing. A figure is only a square if it has four sides, all equal, connected by four angles, all right angles (90°).
One property of a rectangle is that all angles of the figure are right angles.
equilateral parallelogram
360 degrees
The sum of the angles in all triangles (right, isosceles, scalene, and equilateral) in the Euclidean plane is 180 degrees or pi.
A rectangle is a quadrilateral, which is a plane figure bounded by four straight sides. Both opposite pairs of sides are equal in length and all four vertices are right angles.