In the diagram of circle o, what is the measure of ZABC? O 30° O 40° O 50° O 60

Mathematics

2 answers:

denpristay [2]3 years ago

7 0

Answer:

30°

Step-by-step explanation:

Line AB and BC are tangents to the given circle.

$\angle \: ABC = \frac{1}{2} ( 210 - 150)$

$\angle \: ABC = \frac{1}{2} (60) = 30 \degree$

Alternatively, <ABC and <AOC are supplementary because AB and BC are tangents.

$\angle \: ABC + 150 \degree = 180 \degree$

$\angle \: ABC = 180 \degree - 150 \degree = 30 \degree$

The correct choice is A.

netineya [11]3 years ago

3 0

Answer:30

Step-by-step explanation:

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