Tutors Answer Your Questions about Circles (FREE)
Question 187055: I have 2 drawings. One has a circle inscribed in a square(round peg in square hole). The other has a square inscribed in a circle.(square peg in round hole)How do I determine which one is the better fit? Is there some method to this madness????
Click here to see answer by vleith(2825)  |
Question 187055: I have 2 drawings. One has a circle inscribed in a square(round peg in square hole). The other has a square inscribed in a circle.(square peg in round hole)How do I determine which one is the better fit? Is there some method to this madness????
Click here to see answer by stanbon(57966) |
Question 187485: I have a geometry question that is on my worksheet for my homework. My worksheet is labeled Distance in Coordinate Geometry. My question is Given circle O with O(3,-4) and radius 5, find 12 points on the circle with integer coordinates.
I am stuck. I have been taught the formula for finding the equation of a circle which was tuaght to me like this:
EXAMPLE: If the radius of a circle is 16 and the coordinates of the centerpoint are (3,4), then what is the equation?
First, you put the x coordinate of the centerpoint into the first set of parantheses adn the y into the second set of parantheses. It should look like this  .
I hope that this is clear enough. I get stuck here trying to figure out the coordinates of the points on the circle. I think that one of them is (8,-4). Are you suposed to just continue choosing random points to find the points, or is there an easier way? Please help, and thank you so much!
Click here to see answer by stanbon(57966) |
Question 188028: 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 circumfrences of the two circles. Round to the nerest hundredth.
Click here to see answer by Alan3354(31518)  |
Question 189675: dear tutor,
I am having a slight uissue witht his problem and understand none of it so here is the problem (may I ask you 2)
1. C=8/5 X 3.14mm 2. A=1962.5cm^2 it says use pi but the first one has pi the second one dosent please help! Thanks!
Click here to see answer by Alan3354(31518) |
Question 190448: A target is constructed of a 10 ft diameter circular piece of plywood, on which a 2 ft diameter circle was painted. If a person is blindfolded, randomly throws a ball and hits the target, what is the probability they also hit within the smaller circle?
Click here to see answer by checkley75(3666) |
Question 191537: Hi.
In this question it asks for AB to be found.
It is a circle with the center point P. It has a radius of 6 and a chord AB drawn from one point to another. The chord divides the circle into a certain section and it has an arch that on the outside of it it says 120 degrees.
The radius is not drawn horizontally, but if it was drawn horizontally it would still be 6 and would seem to bisect the chord and then create a right triangle onto which the Pythagorean theorem could be used to find 1/2 of AB.
Thanks for your time! :)
Click here to see answer by RAY100(1637) |
Question 192085: Please help me solve this question!
Here are the directions:
Find the radius of the circle inscribed in the triangle.
(its an isosceles triangle and the longer sides have a measurement of 12 and the last smallest side has a measurement of 8)
Now, I know the answer is 2 sqrt ( 2 )
but i need to know what are the steps to getting the answer? please help!!
Click here to see answer by jojo14344(1512) |
Question 192845: The line PR is tangent to circle T. Circle T has a radius with a length of X that forms a right angle with tangent PR. There is also a line TR which finishes forming a right triangle. Line TR is broken up into two parts. TE and ER. TE is a radius equaling X, and ER equals 16. Tangent PR equals 22. The question says to solve for TE, which equals X. I have already tried the pythagorean theorem but it is not working.
Click here to see answer by solver91311(17077)  |
Question 193050: what is the area of a circle with circumference of 18 pi centimeters? Give your answer in terms of pi. i think i should refer to theorem 11-7 and 11-8. i cannot show you what work i have done on this because my keyoard does not have a symbol for pi. thank you
Click here to see answer by RAY100(1637) |
Question 194449: Two circles intersect and have a common chord. THe radii of the circles are 13 cm and 15 cm. The distance between their centers is 14 cm. Find the length of their common chord. I already drew the picture. I drew two circles intersecting each other like a venn diagram. Then, i connected the two centers and that equals 14 and drew a line from the center of each circle to an edge of the circle equaling the radius of each circle. Then, I drew a dashed line down the intersection of the two circles in the middle and a perpendicular line shows up with the line connected by the center. What step am I supposed to take from there?
Click here to see answer by Edwin McCravy(8999)  |
Question 194449: Two circles intersect and have a common chord. THe radii of the circles are 13 cm and 15 cm. The distance between their centers is 14 cm. Find the length of their common chord. I already drew the picture. I drew two circles intersecting each other like a venn diagram. Then, i connected the two centers and that equals 14 and drew a line from the center of each circle to an edge of the circle equaling the radius of each circle. Then, I drew a dashed line down the intersection of the two circles in the middle and a perpendicular line shows up with the line connected by the center. What step am I supposed to take from there?
Click here to see answer by vleith(2825) |
Question 194700: A circle has center (p,q) and is tangent to the x-axis. Write the standard equation of the circle.
I got (x-p)^2 + (y-q)^2 = r^2 but I'm not sure about the radius. Please help to clarify what I would do with r (radius) and why.
Click here to see answer by scott8148(6628)  |
Question 195496: I have worked this problem, but my answer is not one of the multiple choice answers.
Here is the question:
The photo shows several of the mysterious wheat circles appearing in Rockville, California. The biggest circle is claimed to be 140ft in diameter. What is the area of this circle? Use 3.14
Please help me!!!!!!!!!!!
Click here to see answer by Alan3354(31518) |
Question 196104: The circle is tangent to the y-axis and has its center at (-8,-7). Write an equation for the circle. i tried to find the point of tangency by finding the intersection of x=0 and the line perpendicular to it, but i got y=0 and that seemed really wrong. Thank You
Click here to see answer by Alan3354(31518) |
Question 196703: In the accompanying figure, square ABCD is circumscribed about circle 0. The lenght of a side of the square and the diameter of the circle are both 10.(answers can be terms of pie)
a. what is the circumference of the circle?
b. what is the perimeter of the square?
c. what is the area of the square?
d. what is the area of the circle?
Click here to see answer by Alan3354(31518) |
Question 196711: Figure 3-A shows a square inscribed in a circle. The area of the square is 64 square centimeters. Determine the area of the shaded portion of the circle.
Hints:
If the area of the square is 64 square centimeters, what is the measure of each side of the square?
How might you use the measurement of the sides of the square to determine the diameter (or radius) of the circle?
How will knowing the measure of the diameter (or radius) of the circle help you determine the area of the shaded region?
Part 2
Click here to see answer by RAY100(1637) |
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