In the circle above, the measure of angle DHG can be represented by 7 x - 7, and the measure of arc DG can be represented by 9 x + 21. The measure of arc DG is ____ degrees.

In the circle above the measure of angle DHG can be represented by 7 x 7 and the measure of arc DG can be represented by 9 x 21 The measure of arc DG is degrees class=