Angles PTQ and STR are vertical angles and congruent.


In circle N, KL ≅ ML.

Circle T is shown. Line segments T S, T R, T Q, and T P are radii. Lines are drawn to connect points S and R and points P and Q to form secants. Angles R T S and Q T P are congruent.

is tangent to circle P at point Q.

In circle A, ∠BAE ≅ ∠DAE.

In circle T, ∠PTQ ≅ ∠RTS.

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