In ΔABC shown below, segment DE is a midsegment. If AB = 15 units, how long is segment DE? And what other relationship exists between segments AB and DE? Be sure to answer BOTH questions.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

Ibelieve it's a. 2.2 - x = -10.85 (plz tell me if it's right : ) )