Question

I n parallelogram pq=5 and qr+ rs+sp+=21 then qr=?

Answer 1

pq= rs ...so = qr...2 qr = 21-5= 16.so qr = 8

Answer 2

in a parallelogram opposite sides are equal and parallel
so pq =rs=5
qe=sp=say x
qr+rs+sp+pq=21
x+5+x+5=21
2x+10=21
2x=21-10
2x=11
x=11÷2
x=5.5