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joja [24]
3 years ago
8

Please help with geometry

Mathematics
1 answer:
snow_tiger [21]3 years ago
8 0

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

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