1. **Problem statement:** We are given a circle with a tangent line \( \overrightarrow{GH} \) touching the circle at point \( I \), and a chord \( IJ \). The angle between the tangent \( \overrightarrow{GH} \) and the chord \( IJ \) is \( 112^\circ \). We need to find the measure of the minor arc \( \overparen{IJ} \).
2. **Relevant theorem:** The angle formed between a tangent and a chord drawn from the point of tangency is half the measure of the intercepted arc. Mathematically, if \( \theta \) is the angle between the tangent and the chord, and \( m\overparen{IJ} \) is the measure of the intercepted arc, then:
$$ \theta = \frac{1}{2} m\overparen{IJ} $$
3. **Apply the formula:** Given \( \theta = 112^\circ \), substitute into the formula:
$$ 112 = \frac{1}{2} m\overparen{IJ} $$
4. **Solve for \( m\overparen{IJ} \):** Multiply both sides by 2:
$$ 2 \times 112 = \cancel{2} \times \frac{1}{2} m\overparen{IJ} \Rightarrow 224 = m\overparen{IJ} $$
5. **Interpretation:** The measure of the minor arc \( \overparen{IJ} \) is \( 224^\circ \). However, since the total circle is \( 360^\circ \), and the minor arc must be less than or equal to \( 180^\circ \), this means the arc \( \overparen{IJ} \) is actually the major arc.
6. **Find the minor arc:** The minor arc is the complement of the major arc:
$$ m\overparen{IJ}_{minor} = 360 - 224 = 136^\circ $$
7. **Final answer:**
$$ m\overparen{IJ} = 136^\circ $$
This is the measure of the minor arc \( \overparen{IJ} \).
Arc Measure 80Fcfc
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