complementary angles
Pronunciation
Noun
A2 Elementary
Quick answer
Two angles that add up to exactly 90 degrees.
Usage notes
Don't confuse with "supplementary angles", which add up to 180 degrees instead.
Test yourself
Which word fits the gap? "A 30 degree angle and a 60 degree angle are _____."
Answer: complementary angles
In your own words, what does "complementary angles" mean?
Two angles that add up to exactly 90 degrees.
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