Circle O is shown. Line segments C O And A O are radii. Lines are drawn from points C and A to point B to form chords B C and B A. Angle C B A is 80 degrees. What is the measure of angle COA?

∠COA = 160°

Step-by-step explanation:

The angle intercepted on opposite side of the circle from an ARC has a measure of HALF of the Arc.

∠CBA is HALF of the ARC CA

∠CBA is given as 80°

So Arc CA is 80 * 2 = 160°

Now,

∠COA is an intercepted angle that is at the CENTER. This angle has same measure as the Arc it is intercepted from (Arc CA).

Hence,

∠COA = Arc CA

∠COA = 160°

d) 48

step-by-step explanation:

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