Question 28
Triangles and QuadrilateralsFrom the diagram above, find x.
- A.65°
- B.50°
- C.55°
- D.75°
Show the answer and explanation
Answer: A (65°)
Explanation
RS is a diameter, so ∠RTS = 90° and ∠RST = 180° − 90° − 25° = 65°. By the alternate segment theorem, the angle x between the tangent and chord TR equals ∠RST = 65°.