Could somebody help me with this please? i forgot how to do these.

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asked Dec 20, 2020 31.0k views

1 Answer

SJG · Answer 1 · 2020-12-24T15:41:40+0000

Since a full circle has 360degrees and this circle only has two angles, subtract the arc of the known angle to find the arc of the unknown angle.

Angle DGF + angle DEF= 360degrees

Angle DGF + 70degrees= 360 degrees

Angle DGF = 290 degrees

The arc of the unknown angle is 290 degrees

Could somebody help me with this please? i forgot how to do these.

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