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

Tutors Answer Your Questions about Circles (FREE)

Question 49718: i need to find and equation for the circle it had a center(3,0) and has a radius of 9
Click here to see answer by rapaljer(4671)

Question 50124: A drinking glass is in the shape of a cylinder that is 60mm in diameter and 15cm tall. How many cubic centimeters of water will it hold?
Click here to see answer by stanbon(75887)

Question 50936: I have this math problem. The area of a circle is 25 square meters. Find the radius of the circle. What I don't understand is how to solve for r, and the answer has numbers to the hundredth place...
Click here to see answer by Earlsdon(6294)

Question 51419: How do you draw a ying yang with a Compass?
Click here to see answer by rchill(405)

Question 51620: Good evening, I would like to ask you from this problem. Please Help me in this.
1)The circumference of front wheel of a cart is 30 ft long and that of the back wheel is 36 ft long. What is the distance travelled by the cart, when the front wheel has done five more revolutions than the rear wheel.

From Yours poor student
E'ma modi
Click here to see answer by checkley71(8403)

Question 53996: ok I can't figure out this problem please help!
The area of a 60 degree circle is 36 pi cm squared. What is the diameter of the circle?
please help! thanks
Click here to see answer by stanbon(75887)

Question 54267: find the center and radius of the circle given by x(squared)- 4x + y(squared) -6y + 12 = 0
Click here to see answer by Nate(3500)

Question 55924: draw a big circle 1 and draw another smaller circle 2 to the right of the big circle 1 and touches the big circle 1. Draw a line that tangents to both circles at the bottom. Draw a third smaller circle 3 in the space between the two larger circles and the line so that the third circle is touching the two bigger circles and tangent to the line. r1, r2, and r3 are radii of circle 1, circle 2, and circle 3. Express r3 in terms of r1 and r2.
Click here to see answer by Edwin McCravy(20054)

Question 56915: if a wheel that has 3000 revolutions while rolling in a straight line for 45000 in what is the radius of the wheel
Click here to see answer by venugopalramana(3286)

Question 57321: pi r squared
I have a circle that is 25 meters in diameter. I need to find the circumference. somehow, I know that there is a formula for finding the radius/circumference by using pi but do not know exactly how and cannot find the right info in my text. If you can help, I need this by noon tomorrow 10/21 EDT. Thanks
Click here to see answer by stanbon(75887)

Question 57270: givin three sides of a traingle: 330, 270, 240, find the area of the largest possible circle that fits within the triangle
Click here to see answer by venugopalramana(3286)

Question 57806: Draw The circle (uhm...i really dont know what to do and i need your help...uhm, you dont need to draw the circle for me at least show me the solutions on how to solve the problem...)
Given
1. x squared + y squared - 6x - 8y = 0
2. x squared + y squared - 8x + 2y + 8
Click here to see answer by venugopalramana(3286)

Question 58977: Here is a tiring problem. The diameter of a car tire is approximately 60 centimeters. The warranty is good for 70,000 km. About how many revolutions will the tire make before the warranty is up? More than a million? A billion?
Click here to see answer by ankor@dixie-net.com(22740)

Question 59414: Give the equation for the circle with center C(3,-2) and radius 4.
Click here to see answer by funmath(2933)

Question 60213: Given the circle: (y+7)^2+(x-4)^2=18
Find the center:
Find the exact radius:
Can someone show me what formulas to use, and how to use them?
Thank You!!

Click here to see answer by funmath(2933)

Question 60757: Find the equation of the circle that passes through the origin and has its center at (-3,-4).
Click here to see answer by Edwin McCravy(20054)

Question 60756: Write the equation that satisfies the stated conditions. There may be more than one cirle that satifies the equation. Express the final equations in form x^2+y^2+Dx+Ey+F=0
Tangent to the x axis, a radius of length 4, and abscissa of center is -3.
I am so totally lost with this one that I don't even know where to start.
Click here to see answer by Edwin McCravy(20054)

Question 61071: find the center and the radius of the circle:
x2 + y2 - 12x-16y-21 =0
Click here to see answer by joyofmath(189)

Question 61071: find the center and the radius of the circle:
x2 + y2 - 12x-16y-21 =0
Click here to see answer by Earlsdon(6294)

Question 61514: Find the standard equation of the circle that satisfies the conditions.
Center (-1,-3), passing through the point (3,0)
Click here to see answer by funmath(2933)

Question 61514: Find the standard equation of the circle that satisfies the conditions.
Center (-1,-3), passing through the point (3,0)
Click here to see answer by venugopalramana(3286)

Question 61515: find the area inside the square,but outside the circle,given that the radius of the circle is 2ft.use 3.14 for pi. height is 6ft and width is 6ft.
Click here to see answer by ptaylor(2198)

Question 64300: can someone please help me with this question.
Graph 9x2+4y2=144
Thank you

Click here to see answer by rchill(405)

Question 64976: GIVE THE CENTER OF THE CIRCLE WITH EQUATION x^2+2x+y^2-10y+22=0.
Click here to see answer by funmath(2933)

Question 65137: Find the center, radius, and x- and y-intercepts of the circle given by the equation 3x2 + 3y2 - 6x + 5y = 0.
Click here to see answer by stanbon(75887)

Question 64612: Find the center, radius, and x- and y-intercepts of the circle given by the equation 3x2 + 3y2 - 6x + 5y = 0.
Click here to see answer by venugopalramana(3286)

Question 66586: 1. how many square units are in the area of the circle described by x^2+y^2=25? expres your answer in terms of pi.
Click here to see answer by Nate(3500)

Question 67204: Two secants are drawn to a circle from an external point. The external secant length on the first secant is 12 and the internal segment length is 3X+1. The external secant length on the second secant is 15 and the internal segment length is 3X-1. Solve for x to determine the lengths of the two internal segments of the secants.
Click here to see answer by cassiroberts(11)

Question 67516: if an area of a circle is to be roped off by a rope 10m long, what will be the radius of this area? round your answer to two decimal places
Click here to see answer by checkley71(8403)

Question 67873: For what values of K is y=k a tangent to the circle (x-1)^2+(y+4)^2=25?
Click here to see answer by stanbon(75887)

Question 67902: Hi! I have a question that I'm having trouble with. I started to work on it but I'm not too sure if I'm supposed to take the perpendicular bisector or not. Here's the question:
A chord "AB" is 9cm from the center of the circle. The circle has a radius of 15cm. What is the length of "AB"?
If you could help me out, that would be great!
Thanks!
Ryan Desmond
Click here to see answer by stanbon(75887)

Question 68106: What is a circle, Radius, Diameter, Arc, semicircle, Minor arc, major arc, chord?
Click here to see answer by Edwin McCravy(20054)

Question 68730: I need to know: How would i convert (x^2+y^2+2x-10=0) into (x-h)^2+(y-k)^2=r^2 format? I needed to find the radius and the center of the equation.
Click here to see answer by stanbon(75887)

Question 69384: The circumference of a circle is 480 in. What is its radius? What is its diameter?
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Question 69384: The circumference of a circle is 480 in. What is its radius? What is its diameter?
Click here to see answer by funmath(2933)

Question 70067:
Can someone please help me find the circumference of a circle with a radius of 45cm?

Thanks
Click here to see answer by hailu(13)

Question 70179: Help!!!

Find the radius of a circle with an area of 314 sq mm.

Thank you
Click here to see answer by checkley75(3666)

Question 70178: HELP!!!
Find the area of a circle with a radius of 8in.

THANK YOU
Click here to see answer by checkley75(3666)

Question 70334: Two circular regions are tangent to each other, one being larger than the other. The distance between the centers is 10 feet.
Find the radius of each circle if the combined area is 52pi square feet.
Click here to see answer by bucky(2189)

Question 70339:
The endpoints of the diameter of a circle are (-3,2) and (5,-6). Find the center and the radius of the circle. Write the general equation of this circle.
I had thought maybe to to use the midpoint formula and distance formula, but am not really sure.
question 131 from chapter 1 Review Exercises
Click here to see answer by bucky(2189)

Question 70337: Hi,
I am trying to find the center and radius of this circle. I thought I had it until I tried to factor it, so I appreciate any help!

This is what I have so far by completing the square...

Thank you!
note, this is Q 125 from chapter 1 Review Exercises.

Click here to see answer by stanbon(75887)

Question 70497: how do you find diameter when given area
Click here to see answer by Earlsdon(6294)

Question 70941: Suppose there is a semicircle below the rectangle as well as above it. Find the dimensions of the window which admit most sunlight for a given perimeter 8m
Click here to see answer by ankor@dixie-net.com(22740)

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