Question

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Answer 1

11°

Explanation:

If two inscribed angles intercept the same arc, then the angles are equal. In geometry, an inscribed angle is the angle formed in the interior of a circle when two secant lines intersect on the circle.

∠CDA and ∠CBA both intercept the arc AC (Going in the order ADBC), therefore m∠CBA must be equal to m∠CDA.

m∠СBA = m∠CDA = 11°

Answer 2

D

Explanation:

The two given angles both have their ends defined by the chord CA.

Therefore they have the same measurement -- 11 degrees. This is just a property of a circle's chord. Two angles drawn in a circle with the same end points are equal..

The answer is D