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Instructions: Find the measure of the angle indicated.

m/BAC
U
79⁰
D
B
A ?º
85⁰
C

Instructions: Find the measure of the angle indicated. m/BAC U 79⁰ D B A ?º 85⁰ C-example-1
User Broesch
by
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1 Answer

4 votes

The measure of the indicated angle inscribed in the circle is 82 degrees.

The inscribed angle theorem states that "an angle x inscribed in a circle is half of the central angle 2x that subtends the same arc on the circle.

Internal angle = 1/2 × ( major arc + minor arc )

From the diagram:

Major arc BC = 85 degrees

Minor arc DU = 79 degrees

Internal angle =?

To determine the measure of the indicated angle, plug the given values into the above formula and simplify:

Internal angle = 1/2 × ( major arc + minor arc )

Internal angle = 1/2 × ( 85 + 79 )

Internal angle = 1/2 × ( 164 )

Internal angle = 82 degrees

Therefore, the indicated angle measures 82 degrees.

User Steven Shi
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