Question

if two adjacent angles of a parallelogram are equal what is the measure of all angles

Answer 1

since a parallelogram have its opposite angles equal,

we can take the adjacent angles as x

as we sum of all angles as 360 (angle sum property of a quadrilateral)  

so we have four angles <A + <B + <C + <D = X+X+X+X=4X=360

                                                                                             X=360/4

                         

                             ∴X=90