Two angles that add up to 90 degrees

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Multiple Choice

Two angles that add up to 90 degrees

Explanation:
Two angles that add up to 90 degrees are called complementary angles. This ties to the fact that a right angle measures 90 degrees, so when you split that right angle into two smaller angles, their measures add to 90. For example, 30 degrees and 60 degrees form a right angle, so they are complementary. They’re not complementary in other cases: angles that sum to 180 are supplementary, not complementary. Vertical angles are opposite angles formed by intersecting lines and are equal to each other, but their sum isn’t determined to be 90. Congruent angles simply have equal measures, but they could be any value and don’t have to add to 90.

Two angles that add up to 90 degrees are called complementary angles. This ties to the fact that a right angle measures 90 degrees, so when you split that right angle into two smaller angles, their measures add to 90. For example, 30 degrees and 60 degrees form a right angle, so they are complementary.

They’re not complementary in other cases: angles that sum to 180 are supplementary, not complementary. Vertical angles are opposite angles formed by intersecting lines and are equal to each other, but their sum isn’t determined to be 90. Congruent angles simply have equal measures, but they could be any value and don’t have to add to 90.

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