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Transcript
The inscribed angles subtended by the same arc
are congruent
Angle 2
Angle 1
arc
The Tangent Segments to a Circle are Congruent
So the Hypotenuse of
the 2 triangles must be
the same. Same length
sides, common angle,
… they are the same
triangle
This triangle side is
common to both
triangles
These are tangent lines to
the circle
These sides
of the
triangle are
the same
since they
are both
radii
So these must be 90° angles
(By previous property)