find the measure of angles '?' in each of the following.
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Answer:
∠? = 120°
Step-by-step explanation:
In a equilateral triangle, all sides are equal.
∴ ∠A+∠B+∠C = 180 (Angle sum property)
Exterior ∠C = ∠A + ∠B
= 60 + 60 (Angles in a equilateral are equal)
= 120°
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