In the triangle ABC , Angle A = 46° and Angle B = 83°. How large is the exterior angle at C? This is a problem with no diagram

180 - 46 - 83 = 51 is the measure of angle C

the exterior angle at angle C, and angle C, are supplementary. since angle C is 51 because of the interior angle triangle sum theorem, then the exterior angle is: 180 -51 = 129 degrees.

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452,489 to the nearest thousand is 452,000