GRE Math| Questions and Answers with complete solution

The sum of the angles in a quadrilateral is - 360° Any n-sided polygon can be divided into how many triangles? (by drawing diagonals from one vertical) - n-2 The sum of the measures of the n angles in a polygon with n sides - (n-2) x 180 In any polygon, all external angles equal up to - 360° If you measure all exterior angles in a polygon, they all equal - 360° In any Regular Polygon, the measure of each interior angle - (n-2)x180/n In a Regular Polygon, the measure of each exterior angle - 360/n The consecutive angles in a parallelogram equal - 180° A quadrilateral where two diagonals bisect each other - Parallelogram In a rectangle, all angles are - Right In a Rectangle, each angles measures - 90° Each diagonal divides a square into 2 - 45 45 90 Right triangles (x, x, x*square root of 2) What kind of trapezoid has equal parallel sides? - Isosceles Trapezoid