1. calculus

    A regular decagon(12 sides) in inscribed in a circle with the radius r. The decagon has an area of108 in^2. What is the radius of the cirlce?

    asked by Kristina on May 19, 2011
  2. calculus

    A regular decagon(12 sides) in inscribed in a circle with the radius r. The decagon has an area of108 in^2. What is the radius of the cirlce?

    asked by Kristina on May 19, 2011
  3. geometry

    The area of a regular decagon is 50cm2. What is the area of a regular decagon with sides four times the sides of the smaller decagon?

    asked by Matt on April 13, 2012
  4. math

    What is the sum of the measures of the angles of a regular decagon? What is the measure of each angle in the decagon? 1,620°; 162° 2,880°; 288° 1,440°; 144° none of these

    asked by i will pay on February 12, 2018
  5. Math

    Given the regular decagon what is the measure of each numbered angle? There is a one in the first triangle, a three in the second, and a two in the sixth triangle in the decagon. Here are the answer choices m1=72, m2=18, m3=36 m1=18, m2=36, m3=72 m1=36,

    asked by Carly on May 25, 2018
  6. Math

    How big is each interior angle in a regular decagon? would this be 4.4 (144/10)? How big is each exterior angle of a regular decagon? Is this 36? (360/10)

    asked by Tyler on April 16, 2008
  7. Math

    Here is the question that I need to answer: Mr.T wanted to remodel his box, He wanted to make it the shape of a perfect regular dimension. A.) How many total degrees would the interior of Mr.T's decagon have? SHOW WORK. B.)How many degrees would each angle

    asked by Jade on January 8, 2009
  8. calculus

    There is a shape first a regular triangle inscribed in a circle, and inscribed in a square, inscribed in a circle, inscribed in a pentagon, etc. so polygon circle polygon circle, etc. the radius of the first circle is 1, find an equation for radius n.

    asked by Andre on February 22, 2016
  9. geometry

    The area of a decagon is 600 ft2. If the dimensions are reduced by a factor of 4, what is the area of the smaller decagon?

    asked by Anonymous on April 14, 2010
  10. Math

    "Find the area of a rhombus with sides of length 10 in. and longer diagonal of length 16 in." and Also, how do you solve the problem "Find the area of a regular decagon with radius 4 cm."

    asked by Celina on June 9, 2013
  11. College Geometry

    In this assignment, you examine a process that links polygons and circles. You will reach some quantitative conclusions about their respective areas and the relationship between the two. As you know, a regular polygon has sides of equal length and angles

    asked by Lisa on September 3, 2013
  12. math

    Determine if the given regular figures form semi regular tessellation. Triangle,decagon,15-gon Yes or no

    asked by tracy on May 2, 2010
  13. Geometry

    A tabletop has the shape of a regular decagon with a radius of 9.5 inches. What is the area of the tabletop to the nearest square inch?

    asked by Jeanine on April 14, 2016
  14. GEOMETRY CIRCLE

    1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to

    asked by BARBIE LEE on December 8, 2013
  15. GEOMETRY CIRCLES PLEASE

    HELP ME PLEASE. 1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that

    asked by BARBIE LEE on December 8, 2013
  16. GEOMETRY CIRCLES PLEASE

    1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to

    asked by BARBIE LEE on December 7, 2013
  17. geometry

    what is the perimeter of a regular decagon if one side measures 13.5 cm?

    asked by Sharnice on February 15, 2010
  18. math

    Each exterior angle of a regular decagon has a measure of (3x + 6)°. What is the value of x

    asked by lois on September 28, 2016
  19. Math

    How many lines of symmetry does a regular decagon have? 0 5 10 20 I believe the answer is 10. Thanks for the help :)

    asked by Jo on March 13, 2012
  20. GEOMETRY CIRCLES

    1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent

    asked by Talon on December 10, 2013
  21. Geometry about the circles

    1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent

    asked by Talon on December 9, 2013
  22. Geometry about the circles

    1. Ab is a chord of a circle with center o and radius 52 cm . point m divides the chord ab such that am = 63 cm and mb=33 cm find om 2. A circle is inscribed in a triangle whose sides are 10, 10 and 12 units . a second smaller circle is inscribed tangent

    asked by Talon on December 10, 2013
  23. Math

    Determine if the given regular figures form semiregular tessellations. Triangle, decagon, 15-gon? Yes or No

    asked by Jenny on October 25, 2009
  24. maths

    express the angular measurement of angle of a regular decagon in degree grades and radian

    asked by soniya on July 30, 2016
  25. math

    Determine if the given regular figures form semiregular tessellations. #12) Triangle, decagon, 15-gon

    asked by Brandi on October 29, 2009
  26. math

    Find the perimeterof a decagon if each of its sides are 5.9 yards long?

    asked by madison on December 4, 2007
  27. Geometry

    My class is learning about the areas of regular polygons and circles and I'm so confused. How are you supposed to figue out the area a regular triangle inscribed in a circle when all you know is that the radius of the circle is 1.5?

    asked by Sam on April 29, 2011
  28. math

    An isoscelless triangle of sides of 13cm, 13cm, 10cm is inscribed in a circle is inscribed in a circle. What is the radius of the circle?

    asked by abigail on March 17, 2014
  29. Geometry

    OPQRSTUVWX is a regular decagon. A rotation of A degrees about U maps X to R. Given A < 180 degrees, find A. Thought it was 144 but it isn't.

    asked by Sheenybeany on July 31, 2014
  30. math

    A regular polygon is inscribed in a circle of radius 9 cm. Calculate the perimeter of the polygon to the nearest tenth if the polygon has 6 sides.

    asked by Anonymous on November 6, 2016
  31. math

    A regular polygon is inscribed in a circle of radius 11 cm. Calculate the perimeter of the polygon to the nearest tenth if the polygon has 8 sides.

    asked by Anonymous on November 6, 2016
  32. geometry

    A regular hexagon with a perimeter of 24 units is inscribed in a circle. Find the radius of the circle. 

    asked by cyrus on December 13, 2014
  33. Math

    Find the perimeter of a regular 360-sided polygon that is inscribed in a circle of radius 5 inches. If someone did not remember the formula for the circumference of a circle, how could that person use a calculator’s trigonometric functions to find the

    asked by Matty on April 27, 2017
  34. math

    A circle is inscribed in triangle ABC with sides a, b, c. Tangents to the circle parallel to the sides of the triangle are constructed. Each of these tangents cuts off a triangle from ∆ABC. In each of these triangles, a circle is inscribed. Find the sum

    asked by DAS on October 12, 2016
  35. geometry

    a regular hexagon is inscribed in a circle. The radius of the circle is 18 units. What is the area of the region bounded by the inside of the circle and the outside of the hexagon. Round your answer to the nearest hundredth.

    asked by suzy on November 30, 2010
  36. geometry

    Find the area of the region between a regular hexagon with sides of 6" and its inscribed circle.

    asked by blake on September 14, 2017
  37. MATH

    A TRIANGLE IS INSCRIBED IN A CIRCLE SUCH THAT ONE OF ITS SIDES IS A DIAMETER OF THE CIRCLE.IF THE RADIUS OF THE CIRCLE IS 30.5 CM AND ONE OF THE SIDES IS 60 CM, FIND THE AREA OF THE TRIANGLE?

    asked by ROSIEFE on August 21, 2012
  38. math

    A regular hexagon with sides of 3" is inscribed in a circle. Find the area of a segment formed by a side of the hexagon and the circle

    asked by gayathri on October 5, 2015
  39. geometry

    find the ara of a regular octagon inscribed in a circle with a radius of 1 cm.

    asked by ashley on March 5, 2008
  40. geometry

    find the ara of a regular octagon inscribed in a circle with a radius of 1 cm.

    asked by ashley on March 5, 2008
  41. Geometry

    A regular hexagon with sides of 3" is inscribed in a circle. What is the area of a segment formed by a side of the hexagon and the circle?

    asked by Buggy on May 19, 2010
  42. Geometry

    What is the sum of the measures of the interior angles of a convex octagon? What is the sum of the measures of the interior angles of a convex decagon? What is the measure of one interior angle of a regular polygon with 20 sides? Thank You! (:

    asked by Alan on February 3, 2010
  43. geometry maths

    a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the radius of smaller circle and larger circle

    asked by praddy on April 3, 2014
  44. Geometry

    An isosceles triangle has two 10.0-inch sides and a 2w-inch side. Find the radius of the inscribed circle of this triangle, in the cases w = 5.00, w = 6.00, and w = 8.00. Then Write an expression for the inscribed radius r in terms of the variable w , then

    asked by sarah b on April 16, 2010
  45. geomery

    An isosceles triangle has two 10.0-inch sides and a 2w-inch side. Find the radius of the inscribed circle of this triangle, in the cases w = 5.00, w = 6.00, and w = 8.00. And Write an expression for the inscribed radius r in terms of the variable w , then

    asked by Johny g12 on April 12, 2010
  46. geometry

    An isosceles triangle has two 10.0-inch sides and a 2w-inch side. Find the radius of the inscribed circle of this triangle, in the cases w = 5.00, w = 6.00, and w = 8.00. Then Write an expression for the inscribed radius r in terms of the variable w , then

    asked by sarah on April 17, 2010
  47. geometry

    An isosceles triangle has two 10.0-inch sides and a 2w-inch side. Find the radius of the inscribed circle of this triangle, in the cases w = 5.00, w = 6.00, and w = 8.00. And Write an expression for the inscribed radius r in terms of the variable w , then

    asked by Johny G12 on April 11, 2010
  48. geometry

    Answer has to be in exact form. Find the area of the region between a regular hexagon with sides of 6" and its inscribed circle.

    asked by dana on January 15, 2012
  49. Math

    I have two questions that I need help with. 1. Angle of Depression: A Global Positioning System satellite orbits 12,500 miles above Earth's surface. Find the angle of depression from the satellite to the horizon. Assume the radius of Earth is 4000 miles.

    asked by Danielle on March 25, 2008
  50. easy geometry

    1)If diagonals of a rhombus are 10 cm and 24 cm. find the area and perimeter of the rhombus. 2)A regular hexagon with a perimeter of 24 units is inscribed in a circle. Find the radius of the circle. 3)Find the altitude,perimeter and area of an isosceles

    asked by cyrus on December 13, 2014
  51. geometry

    consider a circle of radius 1, and corresponding inscribed and circumscribed polygons with the number of sides n = 3, 4, 5, 6, and 8. A: For each n = 3, 4, 5, 6 & 8, what are the areas of the inscribed and circumscribed polygons with n sides?

    asked by james on July 27, 2013
  52. geometry

    consider a circle of radius 1, and corresponding inscribed and circumscribed polygons with the number of sides n = 3, 4, 5, 6, and 8. A: For each n = 3, 4, 5, 6 & 8, what are the areas of the inscribed and circumscribed polygons with n sides?

    asked by Rachel on July 27, 2013
  53. geometry

    what would be the radius of a circle that can be inscribed in a triangle with sides of 35, 29 and 64?

    asked by echus on October 3, 2011
  54. GEOMETRY

    A. A regular hexagon with a perimeter of 24 units is inscribed in a circle. Find the radius of the circle. B . Find a relationship between the areas of triangle ADC and parallelogram ABCD this is our assignment for tomorrow . . its geeting late please help

    asked by Barbie Lee on October 22, 2013
  55. geometry

    a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the circumradius and inradius of the smaller circle

    asked by praddy on April 3, 2014
  56. geometry

    find the radius of the circle inscribed in a triangle whose sides are 15cm, 17 cm and 8cm?

    asked by v on June 8, 2010
  57. math

    a circle of radius r is inscribed in a right triangle of sides 5cm,12cm,and 13cm.r

    asked by gaurav on December 31, 2015
  58. Math

    What is the area of a decagon with a side length of 4cm?

    asked by angela on April 15, 2012
  59. maths

    ABCD is a trapezoid with parallel sides AB and CD. Γ is an inscribed circle of ABCD, and tangential to sides AB,BC,CD and AD at the points E,F,G and H respectively. If AE=2,BE=3, and the radius of Γ is 12, what is the length of CD?

    asked by ashu on August 21, 2013
  60. math

    An isosceles triangle of sides 13cm, 13cm, 10cm is inscribed in a circle. What is the radius of the circle?

    asked by abigail on March 17, 2014
  61. Math

    What is the total measure of all of the interior angles of a decagon? Is it 360

    asked by Tyler on April 16, 2008
  62. Area Geometry

    Find the area of a decagon with a radius of 4mm. Find the area of an octagon with a radius of 10 cm.

    asked by hope on April 10, 2012
  63. Math

    A circle of radius greater than 9 cm is inscribed in the square ABCD. A point P on the circle is 8 cm from side AB of the square, and 9 cm from side AD. What is the radius of the circle? D-----------C | | | |

    asked by andre on July 4, 2016
  64. maths

    Radius of a circle inscribed in a regular hexagon is 24 c.m. then find the length of the side of hexagon

    asked by sanjay on January 24, 2015
  65. Trig-Algebra help asap

    A regular pentagon is inscribed in a circle whose radius measures 7 cm. Find the area of the pentagon.

    asked by Missy on March 12, 2012
  66. Trig-Algebra help asap

    A regular octagon is inscribed in a circle with a radius of 5 cm. Find the area of the octagon.

    asked by Missy on March 12, 2012
  67. maths

    Radius of a circle inscribed in a regular hexagon is 24 c.m. then find the length of hexagon

    asked by sanjay on January 24, 2015
  68. math (geometry)

    It says: Find the area of a rectangle with length 12 inscribed in a circle with radius 7.5. I know when they're talking about a radius with a figure, they're talking about the length between the center of the circle to a corner of the figure. But that

    asked by Emily on March 16, 2008
  69. math

    A regular hexagon is inscribed inside a circle. The circle has a radius of 12 units. A: What is the approximate measure of the apothem of the hexagon? B: What is the approximate area of the hexagon? Can someone help me?

    asked by Kennedy on January 25, 2018
  70. singh

    a circle inscribed in regular hexagon with each side of regular hexagon √3 cm find area of circle

    asked by Abhishar on January 19, 2017
  71. geometry

    The radius of the inscribed circle is equal to twice the area of the triangle divided by the perimeter of the triangle. Prove that this relationship is true for the inscribed circle in any right triangle.

    asked by elisabeth on November 28, 2011
  72. Math

    Determine whether a regular decagon has reflection symmetry and/or rotational symmetry. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. Explain how you determined your answers

    asked by Mae on October 25, 2012
  73. physics

    A circle with a radius of R is inscribed in a square. On the corner of the square are point charges of +q, +q, -q, and +q. On the circle are charges of +2q, +2q, -q, and +q. (See sketch.) If q = 4.8 micro-coulombs, and the total potential at the center of

    asked by Mandaleigh on February 10, 2012
  74. maths

    an equilateral triangle is inscribed in a circle of radius 40cm. what is the length of the sides of the triangle

    asked by neevetha on March 15, 2015
  75. maths

    4 circles inscribed in a big circle of radius rcm express the radius of the large circle in terms of r

    asked by Riliwan on December 5, 2016
  76. help hexagon geometry

    A regular hexagon is inscribed in a circle and another regular hexagon is circumscribed about the same circle. What is the ratio of the area of the larger hexagon to the area of the smaller hexagon? Express your answer as a common fraction. How is this

    asked by Knights on December 19, 2012
  77. 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

    asked by anonymous on February 19, 2018
  78. Urgent CALCULUS

    So, I haven't posted in a while...but now I am stummped! Only question I can't get today! A team of students seeks to make a flag representing their commitment to the earth. They will be using a green triangle inscribed in a yellow semi-circle. Find the

    asked by Derek on July 25, 2008
  79. geo

    a graphic artist is using a coordinate plane to design a company logo. the log has an equilateral triangle inscribed in a circle.. The lies in quadrant 1, is tangent to the x and y axis and has a radius of 10 units. one side of the triangle is parallel to

    asked by mary on May 14, 2014
  80. Solid Mensuration

    The area of a regular hexagon inscribed in a circle is equal to 166.28 square cm. If the circle is inscribed in a square, find the difference between the area of the square and the hexagon.

    asked by Sol on November 30, 2014
  81. Geometry

    Find the area of a decagon with side of 4cm. Find the area of a pentagon with side length of 10cm Find the area of a hexagon with radius of 5in.

    asked by Jill on April 15, 2012
  82. math

    a diagonal of a polygon is a straight line joining any 2 non-adjacent corners.a decagon has 10 corners. .how many diagonals does it have ?

    asked by karen on February 10, 2013
  83. GEOmetry!!.....

    ABCD is a trapezoid with AB

    asked by i need help from anyone! on March 25, 2013
  84. geometry

    what is the measure of the arc of a regular octagon inscribed in a circle? i think it is 45. am i correct

    asked by Jill on March 10, 2017
  85. Geometry

    What is the area of a regular hexagon inscribed in a circle of diameter 8 inches?

    asked by Anonymous on October 18, 2013
  86. math

    the graph shows a circle with a radius 1 inscribed in the parabola y=x^2. Find the center of the circle.

    asked by blake on March 31, 2010
  87. geometry

    An isosceles triangle has two 10.0-inch sides and a 2w-inch side. Find the radius of the inscribed circle of this triangle, in the cases w = 5.00, w = 6.00, and w = 8.00.

    asked by hodna on April 12, 2010
  88. geometry

    An isosceles triangle has two 10.0-inch sides and a 2w-inch side. Find the radius of the inscribed circle of this triangle, in the cases w = 5.00, w = 6.00, and w = 8.00.

    asked by Johny G12 on April 11, 2010
  89. maths

    ABC is an isosceles triangle inscribed in a circle. If AB and AC is 2.5cm and BC is 14cm find the radius of the circle

    asked by Anonymous on March 21, 2015
  90. statistics

    What is your conclusion based on the following data? A survey was conducted to study the effects of weight loss from a low fat diet. Two random samples of 100 people each were selected. One group was put on the low fat diet and the other group on the

    asked by jerry on June 22, 2013
  91. math

    an equilateral triangle of side 10cm is inscribed in a circle. find the radius of the circle? show the solution

    asked by shafa on March 7, 2019
  92. Maths

    Equilateral triangle ABC is inscribed in circle O, whose radius is 4. Altitude BD is extended until it intersects the circle at E. What is the length of DE? a) √3 b) 2√3 c) 2 d) 4√3

    asked by Mithun raj on December 6, 2017
  93. math

    ABC is an isosceles triangle inscribed in a circle. If AB and AC equal to 2.5cm and BC is 14cm find the radius of the circle

    asked by Anonymous on March 21, 2015
  94. geometry circle

    A 16 cm by 12 cm rectangle is inscribed in a circle.. find the radius of the circle. ~answer

    asked by Barbie Lee on October 22, 2013
  95. math

    ABC is a triangle inscribed in a circle centre O..angle ACB =40¡ã and line And =xcm.calculate the radius of the circle.

    asked by joy on January 8, 2015
  96. Algebra

    Regular pentagon ABCDE is inscribed in circle O. What is the number of degrees in the measure of angle OCE?

    asked by Loren on May 6, 2011
  97. Calculus

    Show that the rectangle with the largest area that is inscribed within a circle of radius r is a square. Find the dimensions and the area of the inscribed square. My respect goes to those who know how to tackle this one.

    asked by Evie on April 19, 2008
  98. Circumference and Area of Circles

    can someone help me with these:Find the radius, diameter and circumference of a circle with an area of 64 cm2. Write your answers as decimals rounded to the nearest hundredth. Find the circumference and area of a circle that has a rectangle inscribed

    asked by mike on May 8, 2007
  99. 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

    asked by bobpursley on November 13, 2006
  100. Geometry

    ABCD is a trapezoid with AB < CD and AB parallel to CD. \Gamma is a circle inscribed in ABCD, such that \Gamma is tangent to all four sides. If AD = BC = 25 and the area of ABCD is 600, what is the radius of \Gamma?

    asked by Jason on March 27, 2013