Question

Can someone help me with this please

Answer 1

The answer is 54.

half of 180 = 54 degrees. This is because of the Inscribed Angle Theorem.

Answer 2

As in the previous problem, the arc angle is subtended at the centre.

By the inscribed arc theorem, the inscribed angle (touching the circumference) is one half of the intercepted arc.

For example,

a=half of 108 degrees = fifty-four degrees, and similarly,

b=(60/2) = 30 degrees.