None - it has no sides - it is round
A square or rectangle or triangle and so on have sides.
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i think that a circle is a shape with no equal sides
circles dont have sides
There are infinitely many 2d shapes. They can have 1 side (a circle or ellipse) to infinitely many. They can have sides that are straight or not, the sides can be equal or unequal in length, the angles can be equal or unequal, etc.
Scalene triangle
A circle has no straight sides but if you mean a circle that has been divided into 5 equal sectors then the angle of each sector is 72 degrees subtended by each arc of the circle.