How do you do circle theorems?

The angle at the centre is twice the angle at the circumference.

The angle in a semicircle is a right angle.

Angles in the same segment are equal.

Opposite angles in a cyclic quadrilateral sum to 180°

(hope this helps can I pls have brainlist (crown) ☺️)

Step-by-step explanation:

1. The angle at the centre is twice the angle at the circumference:

2. The angle in a semicircle is a right angle:

3. Angles in the same segment are equal:

4. Opposite angles in a cyclic quadrilateral sum to 180°:

5. The angle between the chord and the tangent is equal to the angle in the alternate segment:

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.