Your answer will be 390 my 6th grade teacher taught us a song for this perimeter add all the sides all the sides all the side perimeter add the the side area base times height . I hope I could help :)
Any ratio which can be simplified to 1/7 is equivalent to it. So, for example, if you multiply this fraction by 2, you get 2/14, which is equivalent. Or 3/21, or 4/28, or 5/35...
