Question

Please help with geometry

Answer 1

answer : 80

To find angle 1 , we apply outside angle theorem  Lets name each point  Measurement of arc EF=220 degrees  

Measurement of arc GH = 60

Angle D = angle 1

Theorem says  

angle $D = \frac{arc(EF)-arc(GH)}{2}$ Now we plug in the values

angle 1 = $\frac{220-60}{2}$ angle 1 = 80

Measurement of angle 1 = 80 degrees