Construct Circle A. Label child z.

**"If a line is
to a circle, then it
is to the**

**radius drawn to the
point of tangency."**

**"If two segments
from the same exteriod point are tangent to a circle, then they
are**

Construct segment AD. Triangle
DAB is a

Construct Circle A. Hide the child.

** minor**
arc angle, select and the two points that define the arc. Then
select "measure", "arc angle". To measure
a

**"If two chords
intersect in the interior of a circle, then the measure of an
angle formed is **

Hide segments BD, CE, and point F. Construct "lines" BE and CD. Move point B around until the lines intersect outside the circle; label the intersection point G.

**Case One: **If two secants
intersect in the exterior of a circle, then the measure of the
angle formed is

**Case Two: **If a secant
and a tangent intersect in the exterior of a circle, then the
measure of the angle formed is

**Case Three: **If two tangents intersect in the exterior
of a circle, then the measure of the angle formed is

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