The total paid was $345. Twenty students cost $100.00. $345-4100=$245
245/3.50=70 additional students. 70+20=90 students went on the tour
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The sum of the measures of the interior angles of a polygon with n sides is (n – 2)180.
The measure of each interior angle of an equiangular n-gon is.
If you count one exterior angle at each vertex, the sum of the measures of the exterior angles of a polygon is always 360°.