Find the measure of the missing angle in degrees.

Geometry Level 1

Find the measure of the missing angle in degrees.

8 0 ∘ 80^\circ 9 0 ∘ 90^\circ 10 0 ∘ 100^\circ 11 0 ∘ 110^\circ

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1 solution

By the exterior angle theorem ,

? ? = 40 + 60 = 10 0 ∘ ?? = 40 + 60 = \boxed{100^\circ}

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