Question

If the measure of arc FF=47 and the measure of angle ACD=55, determine the measure of arc BD. I really need help with this, thank you!!

Answer 1

d. 8°

Explanation:

It appears as though you intend ∠ECF and ∠ACB to be vertical angles, hence the same measure, 47°. The angle of interest, ∠BCD, is added to that to make ∠ACD, which is 55°. The added angle must be 55° -47° = 8°.