91Ó°ÊÓ

$\stackrel{¯}{JT}$ is tangent to $⊙$$O$ at $T$. Complete.

If $OT=6$ and $JO=10$, then $JT=?$

Find the number of odd and even vertices in each network. Imagine travelling each network to see if it can be traced without backtracking.

Using the letters shown in the diagram, name:

a. two central angles b. a semicircle c. two minor arcs d. two major arcs

Find the measure of central $∠1.$

Draw a circle and several parallel chords. What do you think is true of the midpoints of all such chords?

How many common external tangents can be drawn to the two circles?

Find $AB.$In Exercise $3,$$\stackrel{¯}{CB}$ is tangent to $⊙A.$

Name three radii of $⊙o$.

In exercises $8-13$ find the angle or the arc named.

$∠GQE$

What is the diameter of the circle with radius $8,5.2,4\sqrt{3},j$.