Since angles 1 and 2 form a right angle, a word describes their measure is: C. complementary.
In Mathematics, a right angle can be defined as a type of angle that is formed by the intersection of two (2) straight lines at 90 degrees. This ultimately implies that, a right angle has a measure of 90 degrees and as such, its angles are complementary.
A complementary angle can be defined as two (2) angles or arc whose sum is equal to 90 degrees (90°).
Additionally, all right angles are typically formed as a linear pair and they are marked with a right angle symbol. In this context, we can reasonably infer and logically deduce that both angle 1 and angle 2 are complementary angles because they form a right angle.
Read more on right angle here: brainly.com/question/28453423
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