A square or rectangle are the only regular polygons, but many other shapes have two right angles and two parallel lines.
Depends on the shape. A right triangle has one right angle, a rectangle has 4, an equilateral triangle has none, a circle has no angles. There are polygons with more than 4 right angles, and there is no limit on how many, but those with more than 4 are not convex.
The sum of the interior angles of any n-sided figure is (2n - 4) right angles or (180n - 360) degrees
There can be 0 to 5 right angles, or 1 to 6 obtuse angles in a hexagon.
4 right angles, no other angles.
A square and a rectangle are two of them because they both have 4 interior right angles
two, squares and rectangles
There are infinitely many quadrangles - all of which are polygons - that have sides of different length and angles that are not right angles. There is, however, no specific name for such quadrangles because there are so many different possible shapes.
Polygons
Perpendicular lines make four 90 degree angles otherwise known as right angles.
four
All polygons have the same number of sides as angles. So if there are 12 sides, thereare 12 angles.
Two right angles add up to 180 degrees because a right angle is 90 degrees
None - the edge is curved so no straight sections to make angles
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180 degrees
A right angle is 900, so 2700 make three right angles.