Question

In the figure below, BD and AC are diameters of circle P.

What is the arc measure of minor arc DC in degrees?

Answer 1

Answer: 19

Explanation:

2 lines crossing create 2 pairs of equal angles. The opposite angles are the same. Same goes in a circle.

Answer 2

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Answer:

arc DC = 19°

Explanation:

The acute central angles are vertical angles, so have the same measure. Vertical angles with the same measure intercept arcs with the same measure. The measure of the arc is the measure of the central angle it subtends.

Arc AB = Arc DC = 19°