1. **State the problem:** We are given a circle with two chords intersecting at point L inside the circle. The angles and arcs are labeled as follows:
- Angle at L between rays LJ and LI is 85.5°
- Arc HJ measures (15x + 24)°
- Arc IK measures (42x - 6)°
We need to find the value of $x$.
2. **Formula used:** When two chords intersect inside a circle, the measure of the angle formed is half the sum of the measures of the intercepted arcs. Mathematically,
$$\text{Angle} = \frac{1}{2} (\text{Arc}_1 + \text{Arc}_2)$$
3. **Apply the formula:** Here,
$$85.5 = \frac{1}{2} \big((15x + 24) + (42x - 6)\big)$$
4. **Simplify inside the parentheses:**
$$(15x + 24) + (42x - 6) = 15x + 42x + 24 - 6 = 57x + 18$$
So,
$$85.5 = \frac{1}{2} (57x + 18)$$
5. **Multiply both sides by 2 to eliminate the fraction:**
$$2 \times 85.5 = 57x + 18$$
$$171 = 57x + 18$$
6. **Isolate $x$ by subtracting 18 from both sides:**
$$171 - 18 = 57x$$
$$153 = 57x$$
7. **Divide both sides by 57 to solve for $x$:**
$$x = \frac{153}{57}$$
Show cancellation:
$$x = \frac{\cancel{153}^{3 \times 51}}{\cancel{57}^{3 \times 19}} = \frac{51}{19}$$
8. **Calculate the decimal value:**
$$x \approx 2.6842$$
**Final answer:**
$$x = \frac{51}{19} \approx 2.68$$
Circle Chords Angle 76F245
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