Answer
parallelogram
Work Step by Step
let us take M(0,0) and N(a,0)
Then slope of MN = $\frac{0-0}{a-0}$ = 0
Similarly slope of QP = $\frac{c-c}{a+b-b}$ =0
Therefore MN and QP are parallel because there slopes are equal.
Slope of MQ = $\frac{c-0}{b-0}$ = $\frac{c}{b}$
Slope of PN = $\frac{0-c}{a-a-b}$ = $\frac{c}{b}$
Therefore MQ and PN are parallel because there slopes are equal.
In MNQP quadrilateral opposite sides are parallel to each other.