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Determine the measure of the angle in ?

Determine the measure of the angle in ?-example-1
User Blayne
by
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1 Answer

6 votes

Answer:

? = 30°

Explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

48° is an exterior angle of the triangle, then

? + 18° = 48° ( subtract 18° from both sides )

? = 30°

User MrLane
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