What does <,> mean please and if the number is bigger than another how do I know what symbol to use

Imagine it is an alligator's mouth, the opening side eats the larger number because the alligator would want to eat the greater number then the less one, well, that's how I learned it.

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if i'm not wrong, i would say that the third angle has (72) because the three sides of all triangles have 180 degrees and if we subtract 180 - 62 - 40 = (72) / but i'm not sure about 40 yd.