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Consider circle [tex]\( Y \)[/tex] with radius [tex]\( 3 \, \text{m} \)[/tex] and central angle [tex]\( x Y Z \)[/tex] measuring [tex]\( 70^\circ \)[/tex].

What is the approximate length of minor arc [tex]\( X Z \)[/tex]? Round to the nearest tenth of a meter.

A. 1.8 meters
B. 3.7 meters
C. 15.2 meters
D. 18.8 meters

Sagot :

To find the length of the minor arc [tex]\(XZ\)[/tex] in circle [tex]\(Y\)[/tex] with a radius of 3 meters and a central angle [tex]\(x Y Z\)[/tex] measuring [tex]\(70^\circ\)[/tex], we can follow these steps:

1. Understand the relationship between radians and degrees:
The formula for converting degrees to radians is:
[tex]\[ \text{radians} = \text{degrees} \times \left( \frac{\pi}{180} \right) \][/tex]

2. Convert the central angle to radians:
[tex]\[ 70^\circ \times \left( \frac{\pi}{180} \right) \approx 1.2217 \text{ radians} \][/tex]

3. Use the arc length formula:
The formula to calculate the arc length [tex]\(L\)[/tex] is:
[tex]\[ L = r \times \theta \][/tex]
where [tex]\(r\)[/tex] is the radius and [tex]\(\theta\)[/tex] is the central angle in radians.

4. Substitute the given values into the formula:
[tex]\[ L = 3 \text{ meters} \times 1.2217 \text{ radians} \approx 3.6651 \text{ meters} \][/tex]

5. Round the result to the nearest tenth:
The approximate length of the minor arc is [tex]\(\approx 3.7\)[/tex] meters.

Therefore, the approximate length of minor arc [tex]\(XZ\)[/tex] is 3.7 meters.