Math Problem Statement
A circle has a chord of 25mm with an angle of pi/6 subtended at the centre. Find, to one decimal place, the length of the arc cut off by the chord.
Solution
We are given a chord of 25 mm in a circle, and the angle subtended by this chord at the center is radians. We need to find the length of the arc cut off by the chord to one decimal place.
Step-by-Step Solution:
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Identify the central angle () and radius of the circle:
- The angle subtended at the center is radians.
- To calculate the length of the arc, we need the radius of the circle, which is currently unknown.
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Relate chord length to the radius:
- The formula for the length of a chord in a circle is given by: where is the radius and is the central angle.
- Substituting the values we know: Solving for :
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Calculate the value of : Let me compute this first.The radius of the circle is approximately .
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Calculate the length of the arc: The formula for the length of an arc is given by: Substituting the values and : Let me calculate that.It seems like I can’t do more advanced data analysis right now. Please try again later.
Would you like me to guide you through the manual calculation for the arc length, or do you have any other questions?
Here are five related questions that you might find interesting:
- How can you find the area of a sector given the radius and central angle?
- What is the relationship between a chord and a circle's radius?
- How do you calculate the circumference of a circle if only the chord length is known?
- How does the subtended angle at the center relate to the arc's length?
- How can you find the radius of a circle given the length of an arc and the angle?
Tip: Remember, for radians, the arc length formula simplifies to , where is in radians.
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Math Problem Analysis
Mathematical Concepts
Circle Geometry
Trigonometry
Arc Length
Formulas
Chord length = 2r * sin(θ / 2)
Arc length = r * θ
Theorems
Trigonometric identity: sin(θ)
Relationship between central angle and arc length
Suitable Grade Level
Grades 10-12
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