Question

calculate the angles marked with letters​​

Answer 1

Answer:

60°

Step-by-step explanation:

an angle subtended by an arc at the centre is double than the angle lying on a point on another major arc of the circle

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Answer 2

Answer:

$60 \: degree$

Step-by-step explanation:

2 X angle a = (angle O)

...The angle subtended by an arc of a circle at its center is twice the angle it subtends anywhere on the circle’s circumference.

angle a = 1/2 X 120°

angle a = 60°