what is mgh? mgh = °

Explanation:

Step1: Recall circle - angle sum

The sum of the measures of the arcs of a circle is 360°.

Step2: Set up an equation

Let (m\widehat{GH}=x). Then (60^{\circ}+100^{\circ}+70^{\circ}+x = 360^{\circ}).

Step3: Simplify the left - hand side

(60 + 100+70+x=230 + x). So, (230+x = 360).

Step4: Solve for (x)

Subtract 230 from both sides: (x=360 - 230=130^{\circ}).

Answer:

130