SSC Exam, Railway and Other Exam. Here are some important properties of Parallelograms, Triangles and Circles ...

A parallelogram has two pairs of equal sides ... The sum of interior angles in a quadrilateral is 360°. This fact and the properties of quadrilaterals can be used to calculate angles.

Often we can also use the other properties of a shape to work out more missing angles. Use the fact that parallelograms have two pairs of equal angles to calculate the missing angles in this question.

A refresher course in high school geometry isn’t a prerequisite for “A Parallelogram,” the play by Pulitzer Prize-winner Bruce Norris running at the Mark Taper Forum. But it certainly wouldn ...