Mathematics · Geometry
PQ is a tangent to a circle at point T. R and S are points on the circle such that TR = TS. If ∠PTS = 155°, where P, T, Q lie on the tangent line in order, what is the value of ∠RST?
- 135°
- 245°
- 325°✓
- 455°
Correct answer
25°
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