Formative Chord Tangent Investigation
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Where is the vertex of a CHORD - TANGENT angle?
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Describe
Click on "Show m
What is the chord-tangent angle measure to arc measure relationship.
m chord - tangent
m
m
m
If m
Relationship between a Diameter (Radius) and a Tangent drawn to a Circle
A tangent intersects a circle's diameter (radius) forming a
A diameter (radius) is
Formative Chord Chord Investigation
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Where is the vertex of a CHORD - CHORD angle?
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Compare the m
Click on "Show m
What is the chord-chord angle measure to arc measureS relationship.
m chord - chord
Find the measure of an angle formed by two chords that intersect in a
circle that intersects arcs whose measures are
Formative Secant Secant Investigation (Note: For angles outside the circle we will use Secant Secant as our primary example - same formula for Secant Tangent and Tangent Tangent)
Click on "Show Secant
Where is the vertex of a SECANT-SECANT angle?
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Compare the m
Click on "Show m
What is the Secant-Secant angle measure to arc measureS relationship.
m secant-secant
Formative Secant Secant investigation Formative Secant-Tangent Investigation
Formative Tangent-Tangent Investigation

Find the measure of the angle formed by two tangents drawn to a circle
from the same external point if they intercept a minor arc of 80°.
Find the measure of an angle formed by a tangent and a secant drawn
to a circle from the same external point that intersects arcs whose measures
are 40° and 100°.
Find the measure of an angle formed by two tangents drawn to a circle
from the same point which intercepts a major arc of 230°.
In the diagram below of circle O, chords
Find m
m
m
Which formula would you use to find m
m
Which formula would you use to find
m
Which formula would you use to find m
m
Which formula would you use to find m
Which formula would you use to find m
Which formula would you use to find m
Which formula would you use to find m
m
Which formula would you use to find
Which formula would you use to find the measure of major
Which formula would you use to find the m
m
Which formula would you use to find the
Which formula would you use to find the m
m
**Note: m
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Compare the m