Question

Please help with geometry

Answer 1

Answer : 50 degree

To find angle 1 , we apply outside angle theorem . Refer to the diagram attached below.

Measurement of arc EF=140 degrees

Measurement of arc GH = 40

Angle D = angle 1

Theorem says

`angle D = (arc(EF)-arc(GH))/(2)`

Now we plug in the values

`angle 1 = (140-40)/(2)`

angle 1 = 50

Measurement of angle 1 = 50 degrees