Answer:
90 Degrees.
The angle which is equal to its supplement is 90 degrees.
90
Step-by-step explanation:
Let the required angle be x°
Therefore, it's supplement = (180-x)°
Now, x = 180-x
= x+x = 180
= 2x = 180°
Therefore x\ =\ \frac{180°}{2}\ =\ 90°x = 2180° = 90°
