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It should be noted that in a circle theorem, the angle that's at the center of the circle is twice the angle at the circumference.
<h3>Circle theorem.</h3>An overview of the circle theorem will be given as your information is incomplete. The angle that's in a semicircle is a right angle.
Also, the angles that are in the same segment are equal. Furthermore, the opposite angles that are in a cyclic quadrilateral equal 180°. The angle between the tangent and the radius is also 90°.
Learn more about circles on:
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<h3>hello!</h3>
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Let's simplify the expression:-
Multiply 3 times 1 and 1 times 2:-
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<h3>note:-</h3>Hope everything is clear; if you need any clarification/explanation, kindly let me know, and I'll comment and/or edit my answer :)