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

119,872 results
1. ## Math

A quarter-circle with radius \$5\$ is drawn. A circle is drawn inside the sector, which is tangent to the sides of the sector, as shown. Find the radius of the inscribed circle. The rest is in asymptote size( 100 ) ; // Not to scale. Don't try anything here,

2. ## maths

calculate the area of a sector of a circle which subtends an angle of 45° at the centre of the circle, radius 14cm

3. ## Mathematics

A sector of a circle of radius 7cm subtends angle 270° at the centre. Calculate a. Length of arc b. Area of sector c. Perimeter of sector

4. ## 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.

5. ## 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 =________

6. ## Mathematics

A sector of a circle of radius 8cm is bent to form a cone.find the radius of the cone and its vertical angle if the angle subtended at the centre by the sector is 280

7. ## 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

8. ## 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

9. ## Solid mensturation

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

10. ## Mathematics

a paper cone has a base diameter of 8cm and a height of 3cm.calculate the volume of the cone in terms of pie and make a sketch of the cone and hence use Pythagoras theorem to calculate its slant height and calculate the curve surface area of the cone in

11. ## 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

12. ## maths

A sector of a circle of a radius 6cm subrends angle of 105 at the centre of a circle.calculate the perimeter of the sector and the area of the sector?

13. ## math

find the area of each circle. round to the nearest tenth.use 3.14or 22/7. 1.circle with 6cm 2.circle with 25in 3.circle with 11ft 4.diameter =10.5 5.radius=6.3mm 6.radius=31/4 yd

14. ## Geometry

Find the circumference and area of a circle with radius 8 cm. Express your answer in terms of π.

15. ## 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.

16. ## Math

The center of a circle is A(-3,3) an B(1,6) is in the circle. Find the area of the circle in terms of pi. a^2 + b^2 = c^2 radius is 5 and 25pi

17. ## 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°

18. ## Perimeter and area of a circle

A sector of a circle of radius 6cm subtends an angle of 105 of the centre of the circle. Calculate i. the perpendicular of the sector ii. the area of the sector.(22/7)

19. ## 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.

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

21. ## precalc

Find the area of a sector with a central angle of 5.38 rad in a circle of radius 2.7 mi.

22. ## maths --plse help me..

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

23. ## 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.

24. ## 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.

25. ## 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

26. ## 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

27. ## 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.

28. ## 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

29. ## 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

30. ## geometry

A quarter-circle with radius 5 is drawn. A circle is drawn inside the sector, which is tangent to the sides of the sector. Find the radius of the inscribed circle.

31. ## math

The area of a circle is given by the formula A = ðr2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100ð square inches, what is the radius of the original circle?

32. ## 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?

33. ## Maths

In a sector COD of a circle, centre O , in which angle COD =4/3 radians. The points A and B lie on the OD and OC respectively, and AB is an arc of a circle, centre O, of radius 7cm. Given that the area of the shaded region ABCD is 48cm^2. Find the

34. ## Maths

A sector of a circle subtends an angle of 105° at the centre of the circle calculate the perimeter and area of the circle

35. ## 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

36. ## Trig

a circle of radius, r, with a sector of 45° shaded. (a) Find the length of the arc of the colored sector in the figure when r = 7 cm (b) Find the area A of the sector when r = 7 cm

37. ## Math

Find the area of a sector of a circle if the central angle measures 45° and the radius measures 12 inches. Leave your answer in terms of PI.

38. ## 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

39. ## math

A square is inscribed inside a circle with radius r cm. a) Express the edge length of the square in terms of r and so find the area of the square in terms of r. Using side, 's' would make it much easier, but the question asks for me to find the area of the

40. ## Mathematics

A sector of a circle of radius is 7cm substending an angle of 27% at all he center of the circle is used to form a cone. A. Find the base radius of the cone. B. Calculate the area of base of the cone

41. ## 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?

42. ## 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

43. ## maths

find the angle of a sector of a circle of radius 35cm is 288' find the perimeter of the sector

44. ## Math

The radius, r cm, of a circle at time t seconds is given by r = 2t 2 + 1. Express its area, A cm2 , in terms of t and find the rate of change of the area at the instant when t=2. (Leave your answer in terms of p )

45. ## 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

46. ## 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.

47. ## Geometery

How do I solve this? On my assignment it says find the area inside the square, but outside the circle, given that the radius of the circle is 2 ft. Use 3.14 for ^ I have a picture of a square with a circle in the square, with a base 6 ft. and height 6 ft.

48. ## maths

A circular target is divided into nine parts of equal area by eight concentric rings. If the radius of the target is 27 cm, find the radius of the inner circle. What is the ratio of the area of the inner circle to the area of the whole target? What is the

49. ## Math

The equation 2x^2+2y^2+x+4y+2c=0 represents a circle.(let's name it S1) 1)Find the values of a,b and and show that c

50. ## 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

51. ## 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.

52. ## math

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

53. ## math

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

54. ## 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?

55. ## 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

56. ## precalculus

A sector of a circle of radius 3 mm has an area of 4 mm². Find the central angle of the sector.

57. ## 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

58. ## 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.

59. ## math

Find the area of a sector of a circle if the central angle measures 90 and the radius measures 4 inches. Leave your answer in terms of .

60. ## Math

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

61. ## 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.

62. ## maths

A curved surface of a cone, based diameter 18cm, is formed from a sector of a circle, radius 15cm. find (a) the angle of the sector. (b) the total surface area.?

63. ## 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.

64. ## 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.

65. ## Trig

Find the area of a sector with the given central angle θ in a circle of radius r. θ = 90°, r = 6 cm

66. ## trigonometry

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

67. ## Math/Trig

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

68. ## math

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

69. ## trig

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

70. ## 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?

71. ## geometry b

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

72. ## 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

73. ## Maths

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

74. ## 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?

75. ## 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?

76. ## Maths

1. In the xy-coordinate plane, point A is the midpoint of the segment with endpoints (2,4) and (-4,-4). What is the distance from point A to the origin? I know how to find the distance between the two points- 10. But I don't know where to go from there. 2.

77. ## 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

78. ## 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

79. ## 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.

80. ## Math

I need to find the area of a shaded part. it is a square with a circle the measurements that I have are pi = 3.14 and 15 ft by 15 ft. I know to find the area of the square I take base x height but cannot figure out correct formula for subtracting the

81. ## 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

82. ## Math

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

83. ## 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.

84. ## algebra 1

a high school wrestling mat must be square with 38-foot sides and contain two circles as shown. suppose the inner circle has a radius of "s" feet and the outer circle's radius is nine feet longer than the inner circle. *write an expression for the area of

85. ## algebra 1...urgent

a high school wrestling mat must be square with 38-foot sides and contain two circles as shown. suppose the inner circle has a radius of "s" feet and the outer circle's radius is nine feet longer than the inner circle. *write an expression for the area of

86. ## Algebra

The area of a circle is given by the formula A+pier^2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100pie square inches, what is the radius of the original circle?

87. ## math

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

88. ## 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

89. ## Computer Science (Basics)

public class Circumference { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub ; final double PI = 3.14159; int radius = 10; double area = PI * radius *radius; double circum = 2 * PI * radius;

90. ## math

To find the area, but the easiest approach is using Brahmagupta’ s formula1: If a quadrilateral of side lengths a, b, c, d can be inscribed in a circle, then its area is given by A = sqrt, where s = (a + b + c + d)/2 In this case, a = 2*radius You know b

91. ## 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?

92. ## 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?

93. ## 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.

94. ## Math

The radius of the larger circle is 9cm. The diameter of the smaller circle is 11cm. Find the area of the shaded region The shaded area is between the larger circle and smaller circle . It is concentric The area of the larger circle is 81Ï€. The smaller

95. ## 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.

96. ## maths

Im confused can any1 help me on this question ?? or try and put me on the right track? (a) A circle has radius 2cm (in that circle there is an triangle AOB) and the chord AB has length 3cm. AO is 2cm and BO is 2cm. O is the centre of the circle. (b)

97. ## Math

Calculate the area of a circle with a radius of 2 cm and a circle with a radius of 4 cm. Leave your answers in terms of pi. When the radius doubles, does the area of the circle double? A) 4π cm2; 8π cm2; NO B) 4π cm2; 16π cm2; NO C) 4π cm2; 16π cm2;

98. ## 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

99. ## 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

100. ## 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.