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Name: ______________________________
Guided Notes
Inscribed Angles
Date: ___________________ Period: _____
inscribed angle - an angle formed by 2 chords that intersect at a point on the circle
intercepted arc - the arc that lies in the interior of the angle
∡ABC is an inscribed angle
̂ is the intercepted arc
Theorem - If an angle is inscribed in a circle, then its measure is half the measure of its intercepted arc.
Example #1: Find the m∡BAC
Example #2: Find 𝒎𝑩𝑪
Example #3:
m∡A = ______
m∡B = ______
m∡C = ______
̂ = ______
Theorem - If two inscribed angles of a circle intercept the same arc,
then the angles are congruent.
Guided Notes
Inscribed Angles
Name: ______________________________
Date: ___________________ Period: _____
Theorem - An angle that is inscribed in a circle is a right angle
if and only if its corresponding arc is a semicircle.
Theorem - A quadrilateral can be inscribed in a circle if and only if its opposite angles are supplementary.
Example #4: Use the figure at the right to find each angle or arc measure.
m∡A = ________
m∡B = ________
m∡C = ________
̂ = ________
̂ = ________
Find the a, b and c.
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