Let one of the two equal complementary angles be \(x\).
\(\therefore\) \(x + x = 90\degree\)
\(\Rightarrow\) \(2x = 90\degree\)
\(\Rightarrow\) \(x= \frac{90\degree}{2}= 45\degree\)
Thus, \(45\degree\) is equal to its complement.
Read more: Supplementary and Complementary Angles