# A sector of a circle has a radius 5cm The area of the sector is 5π Work out the arc length

30,891 results
1. ## Math

A sector of a circle has a radius 5cm The area of the sector is 5π Work out the arc length
2. ## How do i do this maths question??

A sector of a circle with radius r cm contains an angle of θ radians between the bounding radii. Given that the perimeter of the sector is 7cm, express θ in terms of r and show that the area is r/2(7-2r)cm square. Hence, find the maximum area of this
3. ## Mathmatics

A sector of a circle of radius 9 cm subtends angle 120 at center of the circle find the area of the sector to the nearest cm
4. ## math

A sector of a circle subtending an angle 300 degrees at the centre is used to form a cone with base radius 6cm. Find the (a.)radius of the circle (b.)volume of the cone (c.)area of the minor sector of the circle
5. ## trigonometry

A sector AOB of a circle, centre O, radius r cm, where the acute angle AOB is theta radians. Given that the perimeter of the sector is 14 cm and that the area of the sector is 10 cm^2, evaluate r and theta.
6. ## math

area of a sector of a circle of radius 36 cm is 54 pie cm square . find the length of the corresponding arc of the sector
7. ## maths geomentry help!!!

the area of a sector PQR is a @rad.and the radius of the of the circle is rcm,the area of the sector is 20cm^2 and the perimeter is 26cm.find r?
8. ## Calculus1

The radius of a sector of a circle is increasing at a rate of 3 cm/sec while the area is decreasing at a rate of 1 cm2/sec. At what rate is the angle of the sector changing when the area is 20 cm2 and the radius os 5cm?
9. ## math

A sector in a circle of radius 8.1 m has an area of 53.5 m^2. The central angle in a sector must be _____o. Round to one decimal place.
10. ## TRIG HELP ASAP

I really need help on this problem. A sector has area of 15 in^2 and central angle of 0.2 radians. Find the radius of the circle and arc length of the sector
11. ## trigonometry

please check my answers. 1.Find the area of the sector of a circle. r=11.8cm, theta-pi/7 radians I got 31.2cmsquared 2.Find the radius of a circle in which a central angle of pi/6radian determines a sector of area 76square meters. I got 17.03m 3.Find the
12. ## trig

In a circle of radius 12 inches, a sector is formed by a central angle of pie/4 radians. Find the area of the sector to the nearest hundredth of a square inch.
13. ## Geometry

Infinitely many different sectors can be cut from a circular piece of paper with a 12-cm radius, and any such sector can be fashioned into a paper cone with a 12-cm slant height. (a) Show that the volume of the cone produced by the 180-degree sector is
14. ## geometry

11. Infinitely many different sectors can be cut from a circular piece of paper with a 12-cm radius, and any such sector can be fashioned into a paper cone with a 12-cm slant height. (a) Show that the volume of the cone produced by the 180-degree sector is
15. ## Mathematics

Mathematics: A chord of radius 12cm subtends an angle of 150 degree at the centre of the circle. Calculate. A. Perimeter of the circle (Ps) B. Area of the circle. (Account) C. Length of the circle (Lc) D. Length of the arc (Last) E. Perimeter of sector
16. ## can xome1 help me plzz im stuck

HELP PLZZ...A circle has radius 2 cm,(in that circle there is a traingle ABO) O is the centre of the circle. the chord AB has length 3 cm. . BO is 2cm AO is 2cm (i) Show that ÚAOB is 1.696 radians (to three decimal places). (ii) Hence ﬁnd the area of
17. ## geometry

FIND THE LENGTH OF THE RADIUS OF THE CIRCLE IS 9cm. THE ARC OF THE SECTOR MEASURES 60 DEGREES. FIND THE AREA OF THE SECTOR.
18. ## Maths

The angle of a sector of a circle with radius 42cm is 120 degree.if the sector is cut out and used to make a cone,what is the curved surface area of the cone?
19. ## Geometry

The measure of the central angle of a sector of a circle is 90degrees. The arc length of the sector is 3(pie) cm. What is the radius of the circle?
20. ## maths

please can some one help me..? Part a - O is the centre of the circle, and P , Q are points on the circumference of the circle, with the angle POQ being a right angle. The radius of the circle is 3 cm. Choose the option that is the area of the smaller
21. ## math

ABC is a sector of a circle with radius R cm and centered at C. The arc DE lies on a circle also centered at C.If the arc DE divides the sector ABC into two regions of equal area. Find the length of the interval CD in terms of R.
22. ## math

An arc AB of length 5cm is marked an a circle of radius 3cm. Find the area of the sector bounded by this arc and the radii from A and B.
23. ## trig

a. A sector that has been cut out of circular plastic sheet which has a circumference of 12.31 m. If the central angle of the sector is 1/4 of a revolution, find the area of the sector.
24. ## Geometry

The circumference of a circle is 20 pi cm. Find diameter, radius, and area of the disk, the length of an arc of 90 angle and area of a 90 angle sector. Answer in terms of pi. d= ___ r= _____, disk area= _______ arc length =______, sector area =________
25. ## pre-calc

Find an angle between 0 and 2ð that is coterminal with the given angle. -8pi/3 A sector of a circle has a central angle of 60°. Find the area of the sector if the radius of the circle is 3 mi.
26. ## differential calculus

a bed is in a form of a circular sector. find its radius if the area of the sector is 1000 centimeter square and its perimeter is a minimum
27. ## Geometry

A piece of paper in the form of a sector of a circle of radius 15 cm is rolled into a cone. Calculate the volume of the cone if the angle of the sector is 240 degrees.
28. ## maths

find the angle of a sector of a circle of radius 35cm is 288' find the perimeter of the sector
29. ## Geometry

ƒ¡ is a circle with center O . A and B are points on ƒ¡ such that the sector AOB has perimeter 40 . What is the measure of ÚAOB (in radians) when the area of the sector AOB is maximized
30. ## Maths

A sector of a circle of radius 8cm is bent to form a cone. Find the radius of the cone and it's vertical angle if the angle substended at the centre by the sector is 280°
31. ## geometry

The sector shown is formed into a cone by joining its two radii. Calculate the volume of the cone correct to the nearest whole number. It shows a diagram with a 240 degree sector or two-thirds of a circle with a radius of 12 cm. How do I do this? Thank you
32. ## math

A circular room has radius equal to 40 feet. Marble is to be laid on a sector of the room. What is the area of the sector if the central angle is 45°?
33. ## Math

A circular sector has an 6.26-inch radius and a 10.84-inch arc length. There is another sector that has the same area and the same perimeter. What are its measurements?
34. ## Cranborne

In the diagram AOBP is the major sector of a circle centre O.BO=8cm, AOB=156° and the sector is bent to form a right cone. a)Caculate the radius of the cone b)Calculate the vertical angle of the cone
35. ## geometry b

in a circle,a 90 dagree sector has an area of 36 pie ft squared.what is the radius of the circle ???
36. ## maths-urgently

An arc of a circle is of length 5p cm and the sector is bounds has an area of 20p cm^2 find the radius of the circle.
37. ## problem solving

What is the maximum area of a sector of a circle with P = 100? (Here is another surprise!!! -- could you believe it is r2 when r = 25? How is this similar to a square being the maximum rectangle and the central angle of the maximum sector being 2 radians?)
38. ## Maths

Calculate the area of the sector of a circle which subtends an angle of 45degree at the center of the circle, radius 14cm

Find the area of a sector of a circle that has a central angle of 3π/8 and a radius of 7 cm.
40. ## Math

How would I calculate the area of a sector of a circle with radius 2 m that subtends an angle pi/3
41. ## Trig

Find the area of a sector with the given central angle θ in a circle of radius r. θ = 90°, r = 6 cm
42. ## math:mensuration plane shapes

a cone that has a base diameter-8cm and height-3cm is cut into a circle's sector, what is the angle of the sector
43. ## geometry!

Γ is a circle with center O. A and B are points on Γ such that the sector AOB has a perimeter of 40. Amongst all circular sectors with a perimeter of 40, what is the central measure of ∠AOB (in radians) of the sector with the largest area?
44. ## Math/Trig

Find the area of a sector of a circle with a radius of 3 m and a central angle of 125degrees.
45. ## trigonometry

find the radius of the circle whose sector area is 426 sq.cm. and central angle 24
46. ## Physics

The angle of a sector of a circle is 75 If the radius of this circle is increasing at the rate of 0.3cm/s find the rate of increase of the area when the radius is 6cm
47. ## math

a circle with center o has radius of 5cm and angle of 60 degrees. find the area of the minor sector find the area of angle aob find the area of the minor segment find the length of the arc minor arc i found the area which is 78.54cm pi =3.14
48. ## maths --plse help me..

Find the area of the sector of a circle of radius 7cm if the corresponding arc length is 6.2cm
49. ## math

In a circle whose radius is 6, find the area of a sector, in terms of pi, whose center angle contains 30 degrees
50. ## math

Radius of a circle with a sector area of 3 square ft determined by a central angle 1/4 radian
51. ## math

In a circle whose radius is 6, find the area of a sector, in terms of pi, whose center angle contains 30 degrees
52. ## trig

given a central angle of 66 degrees find the area of a sector in a circle of radius 12.1 inches
53. ## Math

Hello, I have this question to which it's solution I'm not quite sure of. The question is based on a diagram, and I can't really present it but I'll explain it to my very best, thank you very much for trying to understand my bad presentation of the
54. ## Solid mensturation

Find the area of a sector bounded by a 60 degrees central angle in a circle of radius 6 inches
55. ## geometry

Γ is a circle with radius 10 and center O. A and B are points on Γ such that the arc length ABˆ=13. What is the area of sector AOB?
56. ## trig

An arc subtends an angle 15 degrees at the centre of the circle. If the radius is 4 centimetres, find the area of the sector?
57. ## math

a circular pizza box logo has a sector with a central angle of 80 degrees and a diameter of 16 inches. Find the area of this sector
58. ## geometry

What is the area of the sector, in square units, determined by an arc with a measure 45° in a circle with radius 6? Round to the nearest tenth.
59. ## math

An angle of 1.8 radians at the center of the circle subtends an arc of length 23.4cm. Find: (a) The radius of the circle (b) The area of the sector enclosed by the arc and the radii.
60. ## math

ABC is a sector of a circle with radius R and center C. The arc DE lies on a circle also centred at C. If DE divides ABC into two regions of equal area, find the length of CD in terms of R
61. ## math

sector 2 on a spinner is a 90 digrese (sorry for spelling) sector. if the spinner is spun twice, what is the probability that it will stop in sector 2 both times?
62. ## Maths

A sector of a circle of radius 7cm subtending an angle of 270 degree at centre of the circle is use to form a cone? (A)find the base radius of the cone. (B)calculate the area of the base of the cone.
63. ## math

If the cone in question 22 is made of paper, and the paper is flattened out into the sector of a circle , what is the angle of the sector
64. ## geometry

What is the ratio of the area of sector AOB to the area of sector COD? 1/3,1/4,1/9,3/8
65. ## Maths

The arc of a circle of radius 20cm subtends an angle of 120degree at the center.use the value 3.142 for pie to calculate the area of the sector correct to the nearest cmsquared

If the radius of the right circular cylinder is 4 cm and the height is 16 cm and the measure of the central angle of the shaded sector is 45 degrees, what is the volume of the slice of the cylinder that has the 45 degree sector as it top surface
67. ## Math precalculus II

The area of a sector of a circle with a central angle of 15π rad is 18 m². Find the radius of the circle. I set up my equation as: 18m^2=(1/2)(r^2)(1/5 pi) i isolate r^2 by dividing both sides by (1/2) and (1/5 pi, getting: 180pim^2=r^2 i then take the
68. ## maths

a paper cone has a base diameter of 8cm a height of 3cm. a)caculate the volume of the cone in terms of pie b)if the cone is cut and opened out into the sector of a circle.what is the angle of the sector
69. ## Grammar

Indentify each sentence below with Simple, compound, complex, or compound-complex. Could you pleas tell me if these are correct? 1. After they defeated Germany in World War II, the Allies divided Germany and its capital city, Berlin, into four sectors: a
70. ## geometry

In a circle centered at point O, the ratio of the area of sector AOB to the area of the circle is . What is the approximate measure, in radians, of the central angle corresponding to ? Round the answer to two decimal places
71. ## maths

cutting a circle into equal section of a small central angle to find the area of a circle and olso find area by 4 a sector of rectangle from circle
72. ## Math

A paper cone has a base diameter of 8cm and a height of 3cm(a) use Pythagoras theorem to calculate it's slant height (b)if the cone is cut and opened out into the sector of a circle what is the angel of the sector
73. ## Maths

If O is the centre of the circle and the area of sector OAPB is 5/18 of the area of circle . Find angle.
74. ## History

Why were the 1920s a tale of two nations? That is why did one sector the economy already experience a depression while another part of the economy boom? Be sure to identify which sector boomed and which sector was already in a depression. Why does the
75. ## geometry

I have a circle with a radius of 20in. Arc mEGF = 235(not shaded part of circle) find the area of arc EF (shaded sector of circle). My answer was 82.3 in^2 correct answer is 436.3 in^2 I need disrection on this one- I was really off on my answer.
76. ## 192

a pizza has a radius of 9inches. the pizza is divided into sections. one of the section has a central angle with a measure of 60 degrees wat is da area of this section of pizza? what happens to the area of the sector if u double the central angel? how much
77. ## Gss Giza , nasarawa state

Q.1.Calculate the length of an are of a circle of radius 6 cm if the angle it subtends at the centre of circle is 6o. Q.2. Find the perimeter of a sector of a circle radius 5.2cm if the angle subtend at the centre is (a)3o (b)6o (c)135.
78. ## Trigonometry

31). Find the area of the sector of a circle with a radius of 18 inches and a central angle of pheta=120 I put the info in A=1/2r^2pheta so that it read A=1/2(324)9pi/10. But I got 458.04, not the answer of 339.29. What did I do wrong?
79. ## maths

when making a cone out of a given sector form a circle do we need to add circumfernce of the base circle to find its surface area?
80. ## Algebra 2

If the arc length of a sector in the unit circle is 3π/2 what is the measure of the angle of the sector? 0 radians π/2 radians
81. ## geometry

In a arcade game, the "monster" is the shaded sector of a circle of radius 1 cm, as shown in the figure. The missing piece (the mouth) has a central angle of 60 degrees. What is the area of the monster in cm^2
82. ## GEOMETRY

In a arcade game, the "monster" is the shaded sector of a circle of radius 3 cm, as shown in the figure. The missing piece (the mouth) has a central angle of 60 degrees. What is the area of the monster in cm^2
83. ## math

Dana takes a sheet of paper, cuts a 120-degree circular sector from it, then rolls it up and tapes the straight edges together to form a cone. Given that the sector radius is 12 cm, find the height and volume of this paper cone.
84. ## Politics

I'm writing a speech, and it's about the topic "Private sector investment is preferable to public sector investment for Human Space Exploration" I'm on the con side for this argument, and one of my reasons was that public sector will spur cooperation,
85. ## maths

the area of a circle PQR with centre O is 72cmsquare. what is the area of sector POQ if angle O is equal to 40degree
86. ## Maths

A 160 degree of a sector radius 10.5cm is bent to form a cone,find the vertical angle of the cone
87. ## Trig.

79): Find the area of the sector of the circle. Radius: 2.5 feet. Central Angle: 225 degrees. I multiplied (1/2)(25/4)(5pi/4), and I got 100pi/16, which reduced to 50pi/8 when I halved it. I reduced that to 25pi/4 or 19.63. But the book's answer is 12.27.
88. ## calculus

A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?
89. ## calculus

A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?
90. ## calculus

A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?
91. ## math

The circle above has an area of 36 in2. What is the area of the yellow sector? Use 3.14 for .
92. ## Maths

Calculate the perimeter of the sector of a circle in centimeters. Use pie = 22/7, radius =14cm and angle =45 degrees.
93. ## MATHS

CALCULATE A PERIMETER OF A SECTOR OF A CIRCLE OF RADIUS 7CM WHICH SUBTENDS ANGLE 6ODEGREE AT A CENTRE.
94. ## economy

what is the difference between a savings-surplus sector and a saving-deficit sector?
95. ## Maths

A cone formed by bending a sector of a circle having an angle of 288 degrees. Find the radius of the base of the cone if the diameter of the circle is 18cm
96. ## Maths

A cone is formed by bending a sector of a circle having an angle of 288 degrees.find the radius of the base of the cone if the diameter of the circle is 18cm
97. ## geometry

find the area of the sector with 80 degree angle and radius=8
98. ## math

how to find the area of a sector when the radius is 8 and you leave it in terms of pi
99. ## Math

An Arc of length 6 cm subtends a 80 degree angle in a circle. What is the radius of the circle? Also what is the area of that sector? What I have so far: S=R*80 degree S= R*4pi/9 6 cm= r* 4pi/9 R=6/4pi/9 R= 6*9/4pi R=54/4pi HELP!
100. ## ravehs school

A sector of a circle of radious 10cm and an angle 108° is bent to from a cone find the base radius