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Apply the Alternate Segment Theorem.

Mathematics

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Step-by-step solution

4 steps
  1. Apply the Alternate Segment Theorem.

    The Alternate Segment Theorem states that the angle between a tangent and a chord through the point of contact is equal to the angle in the alternate segment.

    • The tangent is PQ and the chord is AT. The angle between them is ∠PTA=60∘\angle PTA = 60^\circ. Therefore, the angle in the alternate segment, ∠ABT\angle ABT, is equal to ∠PTA\angle PTA.
    ∠ABT=∠PTA=60∘\angle ABT = \angle PTA = 60^\circ
    • The tangent is PQ and the chord is BT. The angle in the alternate segment is ∠BAT=44∘\angle BAT = 44^\circ. Therefore, the angle between the tangent and the chord, ∠QTB\angle QTB, is equal to ∠BAT\angle BAT.
    ∠QTB=∠BAT=44∘\angle QTB = \angle BAT = 44^\circ
  2. Use the information that TC bisects ∠BTQ\angle BTQ.

    Given that TC bisects ∠BTQ\angle BTQ, it means that ∠BTC=∠CTQ\angle BTC = \angle CTQ.
    Since ∠BTQ=∠QTB=44∘\angle BTQ = \angle QTB = 44^\circ:

    ∠BTC=12×∠BTQ\angle BTC = \frac{1}{2} \times \angle BTQ ∠BTC=12×44∘\angle BTC = \frac{1}{2} \times 44^\circ ∠BTC=22∘\angle BTC = 22^\circ
  3. Apply the Exterior Angle Theorem to △BTC\triangle BTC.

    The line ABC is a straight line. This means that ∠ABT\angle ABT is an exterior angle to △BTC\triangle BTC at vertex B.
    The Exterior Angle Theorem states that an exterior angle of a triangle is equal to the sum of the two opposite interior angles.
    For △BTC\triangle BTC, the exterior angle at B is ∠ABT\angle ABT, and the opposite interior angles are ∠BTC\angle BTC and ∠BCT\angle BCT.

    ∠ABT=∠BTC+∠BCT\angle ABT = \angle BTC + \angle BCT

    Substitute the values we found:

    60∘=22∘+∠BCT60^\circ = 22^\circ + \angle BCT
  4. Solve for ∠BCT\angle BCT.

    Subtract 22∘22^\circ from both sides:

    ∠BCT=60∘−22∘\angle BCT = 60^\circ - 22^\circ ∠BCT=38∘\angle BCT = 38^\circ

    Since ∠BCT\angle BCT is the same as ∠ACT\angle ACT, we have:

    ∠ACT=38∘\angle ACT = 38^\circ

    The final answer is \boxed{\text{38^\circ}}.

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