And it's given by the following depiction. So we simply take three ch bonds and we connect them like so, where each bond here is 120 degrees. Now, this intersection in the middle represents our first carbon atom. Now, to visualize the back carbon atom, we simply draw this blue circle, which symbolizes this blue carbon here. And then, because these ch bonds are right across on the same plane of these ch bonds, we simply shift them slightly this way so that we can visualize it. Now, you should know these ch bonds in the back are actually aligned exactly with this ch bond.