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Find the measure of the missing angle using the exterior angle sum theorm

Find The Measure Of The Missing Angle Using The Exterior Angle Sum Theorm class=

Sagot :

IshNoodlez

Answer:

r = 30°

Step-by-step explanation:

According to the Exterior Angle Sum Theorem, the exterior angle, which is 90°, is equal to the 2 interior angles, which are 60° and r°. We know that the angle next to the exterior angle is 90°, and since all angle sums add up to 180°, r = 30°.

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