You just multiply top times top and bottom times bottom and then find a number you can divide into the number and you keep doing that until you can't simplify any more.
Dividing by coefficient other than +1
No, for it to be a right triangle the last length would need to be 2.5 not 3
<h2><em>
h≥60</em></h2>
This is saying that your height has to be equal to or greater than 60 inches.