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Home » How To Find Arc Length And Area Of Sector In Circle (With Examples)? 22 Most Correct Answers

How To Find Arc Length And Area Of Sector In Circle (With Examples)? 22 Most Correct Answers

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Calculate the arc length according to the formula above: L = r * θ = 15 * π/4 = 11.78 cm . Calculate the area of a sector: A = r² * θ / 2 = 15² * π/4 / 2 = 88.36 cm² . You can also use the arc length calculator to find the central angle or the circle’s radius.For a circle, the arc length formula is θ times the radius of a circle. The arc length formula in radians can be expressed as, arc length = θ × r, when θ is in radian. Arc Length = θ × (π/180) × r, where θ is in degree, where, L = Length of an Arc.The radius of the circle is 7 inches and the angle is 60°. So, let us use the area of sector formula. The area of sector = (θ/360°) × π r2 = (60°/360°) × (22/7) × 72 = 77/3 = 25.67 square units. Therefore, the area of the minor sector is 25.67 square units.


Arc Length of a Circle Formula – Sector Area, Examples, Radians, In Terms of Pi, Trigonometry

Arc Length of a Circle Formula – Sector Area, Examples, Radians, In Terms of Pi, Trigonometry
Arc Length of a Circle Formula – Sector Area, Examples, Radians, In Terms of Pi, Trigonometry

Images related to the topicArc Length of a Circle Formula – Sector Area, Examples, Radians, In Terms of Pi, Trigonometry

Arc Length Of A Circle Formula - Sector Area, Examples, Radians, In Terms Of Pi, Trigonometry
Arc Length Of A Circle Formula – Sector Area, Examples, Radians, In Terms Of Pi, Trigonometry

We now encounter many geometric shapes in mathematics. Some of the most common flat figures, such as rectangles, squares, triangles, etc., can be used to find the area and perimeter of any complex figure. In this post, we mainly focus on the shape of the circle and the different parts of the circle to find the sector area and length of the arc. We actually encounter circular shapes in our daily life, such as bicycle wheels, wheel arrows, bracelets and other circular parts. First we start with the base of the circle and then proceed to find the arc length and the area of ​​the sector. (OP and OQ are the radii below, the center of the circle is “O”) In mathematics, we can define a circle as a plane figure that has a trajectory of moving points, so its distance from a fixed point is always the same. The fixed point is the center of the circle, and the distance to the center is the radius.

How To Find Arc Length In A Circle ?

Steps (formula) to find the arc length: First, find the radius of the circle. . Once we have the radius, try to find the sector of the circle with the specified arc as the limit. Then find the angle of that arc at the center of the circle. Finally, apply the following formula to find the arc length: . Arc length formula: (θ/360) × 2πr where “2πr” is the circumference of a circle with radius “r”.

How To Find Area Of A Sector In A Circle ?

Steps (formula) to find the area of ​​a sector in a circle: First, try to find the radius of the circle. . Once we have the radius, try to find the sector of the circle with the specified arc as the limit. Then find the angle subtended by that arc at the center of the circle. Finally, apply the following formula to find the area of ​​a circular sector: .Sector area formula: (θ/360) × πr² where “πr²” is simply the area of ​​a circle of radius “r”. For a full explanation of the above formula, please sit down and continue to the next section.

How To Find The Arc Length Of A Circle ?

An arc is just a portion of the circumference of a circle. This means that you can think of an arc as a boundary portion of any circle. According to the angle formed by the arc in the center, it can be further dived into small arc and large arc. The dark red section shows the small arc above as arc PQ. If the angle subtended by the arc is less than 180° in the center, it is called a minor arc, while if the ‘theta’ value is greater than 180°, it will be the main arc of the circle. The circumference of a circle is called the circumference. To calculate the perimeter, we can use the perimeter formula 2πr. The arc length of a semicircle is: (circumference)/2 = (2πr)/2 = πr Also through the formula we know that the diagonal angle of the semicircle is 180° , . Then: The arch length formula: (θ/360) × 2πr = (180/360) × 2πr = πr And the slice length formula: (θ/360) × 2πr corresponds to the letter of the value 3.1416, or the fraction can be something like 22/ 7 shown. Now the area of ​​the circle is πr² . The area of ​​a semicircle is πr²/2.

What Is Sector Of A Circle ?

Now let’s understand what the sectors in each circle mean (shaded in the image below). Conser a circle (OP/OQ) with center “O” and radius “r”. Suppose we have three points on the circle, namely the points P, Q and R on the circumference. Now, if we connect the center with the two points located at points P and Q, we can see that the circle is dived into two regions, OPQ and OPRQ . Each of these two regions is called a sector of the same circle. So now we have a smaller sector which is part OPQ with arc PQ as part of its boundary. On the other hand, our main sector is that you have an arc PRQ as part of its boundary. Now, a sector of a circle is called a small sector if the small arc of the circle is part of its boundary. Likewise, a sector of a circle is sa to be a major sector if its major arc is part of its boundary. Now suppose that in a given circle, we have a sub-sector below the standard angle “θ” at the center of the circle. Here the main sector has no angle, but we can easily find the angle of the main sector by removing the angle theta from 360 degrees (i.e. main sector angle = 360° – θ). If we add the angles between the primary and secondary arcs of a given circle, the end result is always 360°. Likewise, the sum of the short and long arcs of each circle is equal to the circumference of the circle. The sum of the areas of the large and small sectors of a circle is equal to the area of ​​the circle. In simple terms, we can say that a sector is mainly composed of a plane figure, which is a curved shape composed of two straight lines (radius) with the same starting point (center) and an arc.

What Is The Area Of Sector In Circle ?

Imagine a circle with a center “O” and a radius “r”. Make yourself a sector of the circle such that the angle AOB is equal to “θ”. If θ is less than 180 degrees, then arc ABC is obviously a small circular arc. Now, if we increase the value of θ, the length of the arc AB also increases, and if it becomes 180 degrees, the arc AB becomes the circumference of a semicircle. So if an arc makes an angle of 180° in the mdle, its arc length is πr . If an arc is at the center of the circle at an angle “θ”, its arc length is given by the formula, which is H. Arc Length: (θ/180°) × πr The arc length L of a sector of angle θ in a circle of radius ‘r’ is L = (θ/180°) × πr = = (θ/360°) × 2πr = (θ/360°) × 2πr = (θ/360°) × the circumference of the circle So we can say: Arc length = (θ/360°) × circumference of the circle As above, if the arc spans an angle of 180°, then the corresponding sector area is equal to the area of ​​the semicircle πr²/2 The sector area formula: (θ/360)×πr²The relation between sector area and arc length (abbreviation) ? As mentioned above, given any of these terms , the formulas for both can be correlated and used to find the other value. Suppose the sector area is “A”, the arc length is “L”, the radius is “r”, and the center of the circle is “O”, then: the formula for the sector area: (θ/360) × πr² ; we can also write it as: A = (θ /360) × πr² = 1/2 × [(θ/180) × πr ] × r But we also know that arc length = L = (θ/180 )πr × And finally the relationship between L and A: A = 1/2 × L × r Now let’s solve some examples related to sector and arc length formulas for arbitrary circles: If the sector consists of a circle with a radius of 21 cm, the angle is a sector of 150°. Then find the length of the arc and the area of ​​the sector in that circle. The radius given here is 21 cm and the angle of the sector is 150°. We already know the formulas for sector area and arc length. Sector area formula: (θ/360)×πr², area=(150/360)×πr²=(5/12)×(22/7)×(21)²=1155/2=577.5cm², ARC length formula= (θ/360) × 2πr = (150/360) × 2 × (22/7) × 21 = 55 cm The problem is simple (isn’t it!). Now let’s look at a different type of problem: the perimeter of a sector is 16.4 cm. The radius is 5.2 cm. Now let’s try to find out the area of ​​this sector. Here the perimeter of the sector is OA + OB + arc AB = 16.4 cm d. H. 5.2 + 5.2 + arc AB = 16.4; then, arc AB = 16.4 – 10.4 = 6cm; now let’s try the shortcut formula mentioned above. A = 1/2 × L × r ; here A = sector area and L = arc length so taking the values ​​of A and ‘r’ we have: A = 1/2 × 6 × 5.2 = 15.6 cm² As can be seen from the above calculation out, is that for this given circle, the area of ​​the sector is 15.6 square centimeters, and the arc length AB is 6 centimeters. I hope you enjoyed this post on different ways to quickly find the sector area and arc length of any circle with examples. Stay tuned for more interesting content in this series. Let me know if you have any questions about this. report this ad


How do you find the arc length of a circle sector?

For a circle, the arc length formula is θ times the radius of a circle. The arc length formula in radians can be expressed as, arc length = θ × r, when θ is in radian. Arc Length = θ × (π/180) × r, where θ is in degree, where, L = Length of an Arc.

How do you find the area of a sector of a circle example?

The radius of the circle is 7 inches and the angle is 60°. So, let us use the area of sector formula. The area of sector = (θ/360°) × π r2 = (60°/360°) × (22/7) × 72 = 77/3 = 25.67 square units. Therefore, the area of the minor sector is 25.67 square units.

What is the area of the 90 degree sector?

The fraction of area contained in a sector is the same as the fraction of 360° (a whole angle) contained in the central angle of the sector. For example, a 90° sector would be a quarter slice, with a fourth of the circle’s area.

How do you find the arc length of a sector without an angle?

How to Calculate Arc Lengths Without Angles
  1. L = θ 360 × 2 π r L = \frac{θ}{360} × 2πr L=360θ×2πr.
  2. c = 2 r sin ⁡ ( θ 2 ) c = 2r \sin \bigg(\frac{θ}{2}\bigg) c=2rsin(2θ)
  3. c 2 r = sin ⁡ ( θ 2 ) \frac{c}{2r} = \sin \bigg(\frac{θ}{2}\bigg) 2rc=sin(2θ)
  4. c 2 r = 2 2 × 5 = 0.2 \frac{c}{2r} = \frac{2}{2×5} = 0.2 2rc=2×52=0.

What is the area of a sector of a circle of radius 5cm and its angle is 96?

Answer. The area of a circle of 5 cm radius = (22/7)*5*5 = 550/7 cm.. The area of a sector of the circle with an angle of 96 deg. = (96/360)*(550/7) = 20.95 sq cm.

What is arc in circle?

The arc of a circle is defined as the part or segment of the circumference of a circle. A straight line that could be drawn by connecting the two ends of the arc is known as a chord of a circle. If the length of an arc is exactly half of the circle, it is known as a semicircular arc.

How do you find the length of an arc in Class 10?

Length of an arc formula
  1. Arc is a portion of the circle. Let the arc subtend angle θ at the center. Then, Angle at center = Length of Arc/ Radius of circle. θ = l/r. …
  2. -a- Given radius = r = 5 cm. Length of arc = l = 12 cm. We know that. θ = l /r. …
  3. -a- Given radius = r = 1 cm. Angle = θ = 1 radian. We know that. θ = l /r.

What is the length of arc of a sector whose perimeter is 64.8 cm and radius is 12.4 cm?

Length of arc of a sector = 40 CM.


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