Comparison of even-toed ungulate and cetaceans genetic material has shown that the closest living relatives of whales and hippopotamuses is the paraphyletic group Artiodactyla. Dan Graur and Desmond Higgins were among the first to come to this conclusion, and included a paper published in 1994.
Definition of roundâtrip. : a trip to a place and back usually over the same route.
Best Answer: The peimeter of a polygon is the sum of its sides. A regular polygon will have all sides equal. A non-regular polygon, may have all sides equal but not necessarily. The distance around a polygon is its PERIMETER (peri- means outside and meter is the distance). The distance around a circle is its CIRCUMFERENCE. Source(s): I'm an all-A student in Precal, I know these things. orearmatthew Â· 7 years ago.