In circle T, ∠PTQ ≅ ∠RTS.

Angles PTQ and STR are vertical angles and congruent.


Circle D is shown. Line segments D E, D F, D G, and D H are radii. Angle E D F is 55 degrees, angle F D G is 70 degrees, and angle G D H is 110 degrees.





QR is tangent to circle P at point Q.

Angles PTQ and STR are vertical angles and congruent.





In circle N, KL ≅ ML.

In circle N, KL ≅ ML.

Circle T has diameters RP and QS. The measure of ∠RTQ is 12° less than the measure of ∠RTS.

is tangent to circle P at point Q.

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