Question

find the measure of an angle which is complement of itself

Answer 1

Let the angle be x.
Now according to question,
x + x = 90
= 2x = 90
= x = 45

Hence the angle which is a complement of itself is 45

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Answer 2

$\huge{\bold{Hey}}$
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$\large{\bold{\green{Solution:}}}$

Let one of the two equal complementary angles be $\textit{\underline{x}}$.

∴ $\large{\bold{x + x = 90°}}$

⇒ $\large{\bold{2x = 90°}}$

⇒ $\large{\bold{x = \frac{90°}{2} = 45°}}$

$\textbf{Thus, the angle which is complement}$
$\textbf{of itself is 45°.}$

[ Based on NCERT solutions ]