Questions on Geometry: Circles and their properties answered by real tutors!

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Geometry: Circles and their properties

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Question 197065: What are the steps for inscribing an equalateral triangle in a circle by means of constructions?
Click here to see answer by RAY100(1637)

Question 197065: What are the steps for inscribing an equalateral triangle in a circle by means of constructions?
Click here to see answer by Mathtut(3670)

Question 197618: A diameter of a circle has endpoints at (-1,3) and (-1,-3) Find the area of the circle and please also graph it.
Click here to see answer by Earlsdon(4900)

Question 197705: How do you find the exact area of a circle?
Click here to see answer by jcon16(2)

Question 197784: suppose a chord of a circle is 18 in. long and is 12 in. from the center of the circle. find the length of the radius.

Suppose the diameter of a circle is 26 ft long and a chord is 10 ft long.Find the distance from the center of the circle to the chord.
Click here to see answer by edjones(3296)

Question 197782: What is the radius of a circle if the end points of a diameter are K(-1,4) and J(7,4). Then find the radius of a circle with the cirumfrance of 17pie cm.

Wasnt in school for this lesson and my book is confusing me. Help would greatly appreciated.
Click here to see answer by solver91311(5072)

Question 197788: my teacher wants us to use internet to find correct answers.
line KR is a diameter of circle W. Find x if
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Question 194599: give the equation of a circle tangent to the line 3x+y-2=0 at (-1,5) and with radius of 3.16227766
Click here to see answer by Alan3354(6082)

Question 198263: A circle has a chord running through it that is 6 cm long and 4 cm from the center. How long is the radius
Click here to see answer by josmiceli(3009)

Question 198551: The radii of two circles are 3 cm and 9 cm. Find the ratio of their circumferences
Click here to see answer by jojo14344(1483)

Question 198478: In the diagram of circle O, AB and BC are chords and the measure of angle AOC= 136 degrees. what is the measure of angle ABC?
Click here to see answer by anantha(74)

Question 198771: Two circles have the same center. The radius of the larger circle is 3 units longer than the radius of the smaller circle. Find the difference in the circumference of the two circles. Round to the nearest hundredth.
Thanks.
Click here to see answer by solver91311(5072)

Question 199186This question is from textbook Prentice Hall Geometry
: Find the approximate area of the sector of a circle with a central angle of 50 degrees, and a diameter of 14 feet.(round to the nearest hundredth)This question is from textbook Prentice Hall Geometry

Click here to see answer by solver91311(5072)

Question 199305This question is from textbook prentice hall mathmatics geometry _practice worksheet 12-1
: in each diagram, line ZY is tangent to circles O and P. Find the value of x
circle O has a radius 12
circle P has a radius 9
the distance of line ZY is 25This question is from textbook prentice hall mathmatics geometry _practice worksheet 12-1

Click here to see answer by RAY100(1637)

Question 199732: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by vleith(1977)

Question 199732: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by RAY100(1637)

Question 199728: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by jerrybassmasta(14)

Question 199728: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by RAY100(1637)

Question 199727: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by RAY100(1637)

Question 199726: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by RAY100(1637)

Question 199725: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by RAY100(1637)

Question 199724: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by RAY100(1637)

Question 199723: Two chords of a circle are perpendicular and congruent, does one of them have a diameter?
Click here to see answer by RAY100(1637)

Question 200379: Two circles of radius r and 2r overlap (not over the centres) such that
they have a common chord of length 2c (using 2c since easier to "handle").
The measurement across the two circles perpendicular to the chord is k.
(this measurement goes through the circles' centers, of course).
Givens are c and k. What is r in terms of c and k?
This is not homework, but a problem I've made up.
I have worked on this for a while; as example:
equating areas from Heron and the usual base*height/2:
(48k)r^3 - (36c^2 + 44k^2)r^2 + (24c^2k + 12k^3)r - (4c^2k^2 + k^4) = 0.
Tried other ways, like combination of Sine/Cosine laws:
but I keep ending up with an irreducible cubic.
Am I trying for something impossible? Thank you for any help.
Click here to see answer by RAY100(1637)

Question 200621: how many corners are there in a circle?
Click here to see answer by vleith(1977)

Question 200617This question is from textbook Geometry
: A computer screen is a coordinate plane in which each pixel is one unit. A typical computer screen measures 640 pixels horizontally and 480 pixels vertically. The origin of the plane is the upper left corner of the screen, so all x-coordinates are positive and all y-coordinates are negative.
A computer programmer wants to create a circle that is as large as possible for a typical screen. What is the equation of the circle?
This question is from textbook Geometry

Click here to see answer by Alan3354(6082)

Question 200661: Hi all, I was wondering if someone could help with the following:
I need to determine the radius of the circle:
x^2 + y^2 + 2x - 6y - 6 =0
If someone could show me with steps and explanations that would be great.
Thnaks, -Nick.
Click here to see answer by Alan3354(6082)

Question 200662: Hi everyone, I was wondering if someone could show me how to find the equation of a circle which has a centrepoint of (-2, 5) and passes through point (1,3). I also need to know what the radius of the circle is.
If someone could show me how to do the previous with full working, with steps and notation i would be really grateful.
Thnaks again, -Nick.
Click here to see answer by Alan3354(6082)

Question 200697: Find the radius of the circle touching the straight lines x-2y-1 = 0 and
3x-6y+7 = 0.
Please help.
Thanks
Click here to see answer by Alan3354(6082)

Question 202800: 3x^2+3y^2-24x-12y-15=0 Graph the circle using (h,k) and R find the intercepts if any
Click here to see answer by jsmallt9(593)

Question 202800: 3x^2+3y^2-24x-12y-15=0 Graph the circle using (h,k) and R find the intercepts if any
Click here to see answer by Earlsdon(4900)

Question 202977This question is from textbook Discovering geometry an investigative approach

: 1) Given a segment x long construct a rhombus, whose perimeter is x and having one pair of opposite angles that are 45 degree. tell me the steps to do it. PLEASE help me about this problem. its due tomorrow(July 14th). Please help me......This question is from textbook Discovering geometry an investigative approach

Click here to see answer by scott8148(3382)

Question 203091: A square is inscribed in a circle. The area of the square if 64 square centimeters. Determine the area of the shaded portion of the circle.
Click here to see answer by RAY100(1637)

Question 203503: In a question I do not know what is the first step in solving the question.
Given that the perimeter of the sector AOB is 18cm and that the area is 8cm2, calculate the values of r and (theta).
Click here to see answer by jsmallt9(593)

Question 203863: help needed:
Give points which are outside and pont which are inside of the circles in this equation: x^2+y^2+6x=0
p.s: could you please explain the solution for me that I can solve a group of questions like this ? Thank you:)
Click here to see answer by Alan3354(6082)

Question 203944: Find m such that the line y=mx+3 is tangent to the circle x^2+y^2=2
Could you guide me how can I find m in a circle equation?thanks
Click here to see answer by RAY100(1637)

Question 204070: a circle has a circumference of 42 pi ft. find its area in terms of pi. Can you please show me the steps of how to do this?
Click here to see answer by jojo14344(1483)

Question 204069: a circle has a radius of 6cm. find the area in terms of pi of a sector of the circle with a 140 degree central angle. Can you please show me the steps of how to do this?
Click here to see answer by jojo14344(1483)

Question 204284: The circumference of a circle is 18 pie inches. Determine the area of the circle.
Click here to see answer by solver91311(5072)

Question 204356: The length of the perpenduclar from the origin on the line 6x+16y+2=0 is?
Click here to see answer by vleith(1977)

Question 204866: A circular pool 6 feet in diameter is surrounded by a flowerbed that is 3 feet wide? How much fencing is needed to go around the outside of the bed? round to the nearest hundredth foot.
Click here to see answer by rfer(2688)

Question 204867: A flower bed is designed with a semicircular areas attached to a swuare. how much edging is needed to go around the outside of the bed? round to the nearest thousandths. the problem shoes each circular side is 15 feet
Click here to see answer by Earlsdon(4900)

Question 205219: find the difference of areas if the radius of the bigger circle is 6 cm. The radius of the bigger circle is the diameter of the smaller circle.
note: you dont have to use the value of pi, the answer may be like this: 9π sq. cm
Click here to see answer by rfer(2688)

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