1080
360 degrees
720 degrees
The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees.
The internal angles sum to 360 degrees.
(20-2)x180/20=162
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The sum of the internal angles always equals 180o
The sum of the internal angles of any triangle is 180 degrees. Any rectangle has four 90 degree internal angles, totalling 360 degrees.
1080
the sum of the internal angles is 540 degrees
Any quadrilateral may be split into two triangles; the sum of internal angles of any triangle is 180 degrees; so the sum of internal angles of a quadrilateral will then be the double of the sum of internal angles of a triangle: 180 x 2 = 360.
The internal angles add to 180 degrees.
360 degrees
2700
180 degrees
The sum of the internal angles of a heptagon is 900 degrees. This can be found be multiplying one angle, 128 and four sevenths, by 7.