1. The problem statement, all variables and given/known data If angles of a quadrilateral are in the ratio 2:7:2:7, then the quadrilateral is? a) Square b) Rectangle c) Rhombus d) Parallelogram 2. Relevant equations 2x+7x+2x+7x= 360 x=20 3. The attempt at a solution Since two pairs of opposite angles of a quadrilateral are equal, hence it must be a parallelogram... The book says rhombus as an answer... The book is wrong... Right?