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Find the measure of the exterior Angle1 (I’m a bit confused on how exterior angles work)

Find the measure of the exterior Angle1 Im a bit confused on how exterior angles work class=

Respuesta :

Answer:

70

Step-by-step explanation:

I would do 40 + 30 = 70

180-70 = 110

110 is the last angle bc all angles add to 180 in a triangle

Then 180 - 110 = 70 for angle 1 because their supplementary

I don't know if you could just add the 2 inside angles but I would do it this way to be safe until I know for sure.

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