Question:

In the figure below, \( m(\text{arc NS}) = 125^\circ \), \( m(\text{arc EF}) = 37^\circ \). Find the measure of \( \angle NMS \). 

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For angles formed by two secants, use the formula: \( \text{Angle} = \frac{1}{2} (\text{larger arc} - \text{smaller arc}) \).
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Solution and Explanation

Step 1: The measure of the angle \( \angle NMS \) is equal to half the difference of the measures of the intercepted arcs: \[ \angle NMS = \frac{1}{2} \left[ m(\text{arc NS}) - m(\text{arc EF}) \right]. \] Step 2: Substituting \( m(\text{arc NS}) = 125^\circ \) and \( m(\text{arc EF}) = 37^\circ \): \[ \angle NMS = \frac{1}{2} \left( 125^\circ - 37^\circ \right) = \frac{1}{2} \times 88^\circ = 44^\circ. \]
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