Answer:
160.0 cm²
Step-by-step explanation:
R = 42 cm; s = 44 cm
1. Central angle θ (working in radians)
θ = s/R
θ = 44/42
θ = 22/21
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2. Area of sector
A = ½R²θ
A = ½(42)²(22/21)
A = ½(42×21×2)(22/21)
A = 924 cm²
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3. Area of triangle
A = ½R²sinθ
A = ½(42)²sin(22/21)
A = ½ ×1764 × 0.8662
A = 764.0 cm²
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4. Area of segment
Area of segment = Area of sector – area of triangle
= 924 – 764.0
= 160.0 cm²
The area of segment is [tex]\boxed{160{\text{ c}}{{\text{m}}^2}}.[/tex]
Further explanation:
The formula of angle can be obtained as follows,
[tex]\boxed{\theta= \frac{{{\text{arc}}}}{{{\text{radius}}}}}[/tex]
The formula for area of sector can be expressed as follows,
[tex]\boxed{{\text{Area of sector}} = \frac{1}{2}{r^2}\theta }[/tex]
The formula for area of triangle can be expressed as follows,
[tex]\boxed{{\text{Area of triangle}} = \frac{1}{2}{r^2}\sin \theta }[/tex]
Given:
The radius of the circle is [tex]42{\text{ cm}}.[/tex]
The length of an arc is [tex]44{\text{ cm}}.[/tex]
Explanation:
The radius of the sector is [tex]42{\text{ cm}}[/tex] and the length of an arc is [tex]44{\text{ cm}}.[/tex]
The angle can be obtained as follows,
[tex]\begin{aligned}\theta&= \frac{l}{r}\\&=\frac{{44}}{{42}}\\&= \frac{{22}}{{21}}\\\end{aligned}[/tex]
Area of the triangle can be obtained as follows,
[tex]\begin{aligned}{\text{Area}}&= \frac{1}{2}{r^2}\sin {{\theta }}\\{\text{ }}=&\frac{1}{2}{\left( {42} \right)^2}\sin \left( {\frac{{22}}{{21}}} \right) \\&=882 \times 0.8662\\&=764{\text{ c}}{{\text{m}}^2}\\\end{aligned}[/tex]
Area of sector can be obtained as follows,
[tex]\begin{aligned}A&= \frac{1}{2}{r^2}\theta\\&= \frac{1}{2} \times {\left( {42} \right)^2} \times \left({\frac{{22}}{{21}}} \right) \\&= 924{\text{ c}}{{\text{m}}^2}\\\end{aligned}[/tex]
The area of segment can be obtained as follows,
[tex]\begin{aligned}{\text{Area of segment}}&= {\text{Area of sector}} - {\text{Area of triangle}}\\&= {\text{924}} - 764\\&= 160{\text{ c}}{{\text{m}}^2}\\\end{aligned}[/tex]
The area of segment is [tex]\boxed{160{\text{ c}}{{\text{m}}^2}}.[/tex]
Learn more:
1. Learn more about inverse of the functionhttps://brainly.com/question/1632445.
2. Learn more about equation of circle brainly.com/question/1506955.
3. Learn more about range and domain of the function https://brainly.com/question/3412497
Answer details:
Grade: High School
Subject: Mathematics
Chapter: Area of Circles
Keywords: area, minor segment, circle, radius 42 cm, length of the corresponding arc is 44 cm, sector, segment.
