(a) A triangle has three interior angles. The sum of the interior angles of a triangle is always 180 degrees. So, the sum of the interior angles of a triangle is 180 degrees.
(b) A quadrilateral has four interior angles. The sum of the interior angles of a quadrilateral is always 360 degrees. So, the sum of the interior angles of a quadrilateral is 360 degrees.
(c) A heptagon has seven interior angles. The formula to find the sum of the interior angles of a polygon with n sides is (n-2) x 180 degrees. Therefore, the sum of the interior angles of a heptagon is (7-2) x 180 degrees = 5 x 180 degrees = 900 degrees. So, the sum of the interior angles of a heptagon is 900 degrees.
Calculate the sum of the interior angles of the following (a)a triangle (b)a quadrilateral (c)a heptagon
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