Constructing Tangents to Circles
Precalculus · Flashcards · Recall
PRECALCULUS · FLASHCARDS
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QUESTION
If
O
P
=
r
OP=r
O
P
=
r
, how many tangents can be constructed from
P
P
P
to the circle?
QUESTION
What theorem relates a tangent line to the radius at the point of tangency?
QUESTION
What condition guarantees that a line is tangent to a circle at point
T
T
T
?
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ANSWER
The line is tangent at
T
T
T
if it is perpendicular to radius
O
T
OT
O
T
. Forms 90° angle with radius at contact point.
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