complementary angles

noun

mathematics
: two angles that add up to 90 degrees

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“Complementary angles.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/complementary%20angles. Accessed 20 Apr. 2024.

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Kids Definition

complementary angles

noun plural
: two angles whose sum is 90 degrees
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