Question

In circle A shown below, the measure of ∠BAD is 148°:

If m BC is 105°, what is m CD?
ANSWERS
74
148
43
31

Answer 1

43 i alredy learned that in school

Answer 2

43°

Explanation:

Remember that the subtended arc of a central angle has equal measure.

So, in this case the angle is 148°, that means the arc BD is 148°.

Now, if arc BC is 105°, it means the measure of arc CD is the difference

`arc(CD)=148\°-105\°=43\°`

Therefore, the right answer is 43°.