We often use that to connect two sentences. I want to pause somewhere when the sentence is long and complicated. Where do I pause in the following sentence? Before that or after that?
The Pythagorean theorem states that given a right triangle the square of the side opposite the right angle is equal to the sum of squares of the other two sides.
Moreover, I want to add commas.
The Pythagorean theorem states that given a right triangle, the square of the side opposite the right angle is equal to the sum of squares of the other two sides.
I want to add a comma around that, but somehow it seems weird. Is it OK to put one there? On the other hand, if I don't put comma it seems also weird, because the above sentence is basically the combination of two sentences before that and after that.
[Edit]: Thanks for many answers. It's hard for me to choose best one, so I guess it's better to leave it to users. Still I am not sure if I can pause around that, but it seems it's after that if it's allowed. And for commas, is it correct to think that I may pause even if there is no comma, but I must pause at a comma?