What additional information would prove that DEFG is an isosceles trapezoid

A,) cause a & b are equal & both gives 180°

Answer accretion;

No, because you are more likely to see volcanic mountains where magma is rising along the mid-ocean ridge spreading to the center.

There are allot let me mention a few. 1. catholicism 2. orthodox3. lutherans 4. protestants. they are different because, catholicism has a pope but not the orthodox even though they are almost the sames