Yes by using the formula: (n-2)*180 = sum of interior angles whereas n is the number of sides of the polygon
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Yes. In the regular polygon, the angles are all equal parts of the 1,080 . In the irregular one, there are bigger and smaller interior angles, but they still add up to the same total.
There are as many interior and exterior angles as there are sides (the line segments that make up the polygon. The sum of each pair of exterior angle and interior angle is 180 degrees, i.e. they are supplementary. For concave polygons, there will be at least one "negative" exterior angle paired with an interior angle of greater than 180 degrees - the total of the angles is still 180 degrees.
720° Each angle for a N-sided regular polygon can be found by:Interior Angle = 180° - (360°/N) ; For N=6 this is 120°. Then for the total of all angles, just multiply by 6. Note that the total of all angles will still be 720°, even for a non regular hexagon. So general formula for total of all interior angles:(Sum of interior angles) = N*180° - 360°
A rectangle has four interior angles that are exactly 90 degrees. A parallelogram can have two opposite angles larger than 90 and the other two, smaller than 90 degrees but still add up to 360 degrees.
A shape with no right angles but is still a quadrilateral is called a rhombus. A rhombus has four sides of equal length and opposite sides that are parallel to each other. Although its angles are not right angles, they are all congruent.