(click here)! stop here does anyone knows the answer click here ! quick ! length perimeter

Perimeter of figure EFGH=10,because they say that figure ABCD is similar t
o figure EFGH.Side BC is twice bigger than side FG and by knowing that it means that the perimeter of figure EFGH is half of the perimeter of figure ABCD,which is 20/2 and that gives 10.I hope it helped.. :-)