2 angles, angle A and angle B, form a linear pair. Angle B is an obtuse angle. What type of angle is angle A

Linear pair is angles that make up a straight line, or in other words, 180 degrees. If one angle is obtuse (bigger than a right angle/90 degrees), then the other angel will be acute (smaller than a right angle/90 degrees).

So, the answer: acute angle.

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