1) what is formula to find out interior angle in polygon? a) 180 x 5n b) (n-2) x 180 c) (n+2) x 180 d) 360 X 5n e) 360 _ 5n f) 90 x n2 2) which are regular polygon? (three answers) a) square b) triangle c) pentagon d) circle e) hexatone f) octagon 3) choice the correct sentences. a) hexatone is a foursquare. b) trapezium is a quadrilaterals c) sum of interior angles in triangle is 360º  d) an angle less than 90º is an acute angle e) Isosceles triangles have 2 equal sides and 2 equal angles f) The measuring unit of an angle is circle

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