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

Mathematics

1 answer:

goblinko [34]3 years ago

4 0

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

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