# what are the angle properties of a circle?

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The radius of a circle meets the tangent of the circle at right angles at the tangent point.

The chord of a circle subtends an angle which is twice that of the angle it makes on the circumference.

The angles a chord makes on the same side of the circumference are equal,

The sum of the diagonally opposite angles of a concylic quadrilateral is equal to 180 degrees.

The sum of all the exterior angles of a concyclic polygon is 360 degrees.