Squares and rectangles always do.
Because it has 4 equal sides and 4 equal angles of 90 degrees.
A regular polygon with each exterior angle measuring 90 degrees is a square. This is because the sum of the exterior angles of any polygon is 360 degrees, and a polygon with exterior angles of 90 degrees would have four angles (360/90 = 4), indicating it has four sides. Therefore, the polygon is a regular quadrilateral, specifically a square, where all sides and angles are equal.
If all of its exterior angles are 90 degrees then it will have 4 sides
90 degrees per side, 4 angles
90 x (2 x 15 - 4) ie 90 x 26 = 2340o. The sum of the interior angles of an n-sided polygon always is 90 x (2n - 4) degrees
Because it has 4 equal sides and 4 equal angles of 90 degrees.
Only if the polygon is a regular quadrilateral.
If all of its exterior angles are 90 degrees then it will have 4 sides
90 degrees per side, 4 angles
Any regular polygon with more than 4 sides has angles of more than 90 degrees. Some examples would be:PentagonHeptagonOctagonNonagonDecagonDodecagon
90 x (2 x 15 - 4) ie 90 x 26 = 2340o. The sum of the interior angles of an n-sided polygon always is 90 x (2n - 4) degrees
It is a right angle triangle
If each angle measures 90 degrees the polygon is a square and so its angles sum to 360 degrees.
A triangle having all angles less than 90 degrees is a polygon having no parallel sides and all acute angles.
The smallest regular polygon, an equilateral triangle, has interior angles of 60. A square has interior angles of 90. There can't exist a regular polygon with interior angles of 30.
it depends what kind of polygon but the sum of the angles will equal a # divisible by 90
Vertical angles