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sergij07 [2.7K]
1 year ago
10

Select the correct answer from each drop-down menu.The center of the circle is at O. Segment AB is tangent to circle O at point

D.DBOFThe measure of XADO isThe measure ofVequal to (mCF +mDE)ResetNext

Mathematics
1 answer:
IRISSAK [1]1 year ago
4 0

Based on the tangent theorem, m∡ADO = 90°.

Based on the angles of intersecting chords theorem, m∡CGF = 1/2(mCF + mDE).

What is the Angles of Intersecting Chords Theorem?

The angles of intersecting chords theorem states that when two chords in a circle intersect, the angle formed inside the circle at the point of intersection has a measure that is half of the sum of the measures of the intercepted arcs that are formed by the angle and its vertical angle.

<h3>What is the Tangent Theorem?</h3>

According to the tangent theorem, if a line is tangent to a circle, the segment forms a right angle at the point of tangency with the radius of the circle.

Since line AB is tangent to circle O at point D, therefore, based on the tangent theorem:

The measures of angle ADO = 90°

Chord CE and DF intersect in the circle, therefore, based on the angles of intersecting chords theorem:

The measure of CGF = 1/2(mCF + mDE).

Learn more about the tangent theorem on:

brainly.com/question/9892082

#SPJ1

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