Question

Which formula would be used to find the measure of
angle 1?
1/2 (aº + bº).
1/2(a-cº).
1/2 (b° +cº).
1/2(aº – bº).

Answer 1

Check the picture below.

Answer 2

The formula that would be used to find the measure of angle 1 will be

m<1 =12(a - b)

To get the measure of angle 1, the circle theorem below will be used as shown:

The angle at the vertex of the circle is equal to half of the difference of the intercepted arc.

• Angle at the vertex = m<1

• Angles at the intercepted arc ar m<a and m<b

The formula that would be used to find the measure of angle 1 will be

m<1 =12(a - b)

Learn more on circle theorem here: https://brainly.com/question/1503481