Ell has a rectangular piece of paper. He wants to figure out how much paper he will have left after he cuts out the isosceles triangle shown below.

The household makes $424.45

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)