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

Tutors Answer Your Questions about Circles (FREE)

Question 678416: Find the equation of the circle if it is tangent to the line x+y=2 at point (4,-2) and the center at x-axis.
Click here to see answer by MathLover1(20849)

Question 679715: In the figure below, what is the name given to point A if line m is tangent to circle B? Answer

center

point of tangency

tangent

intersection
Click here to see answer by pmatei(79)

Question 680213: if my diameter is 15 than what is my circumference

Click here to see answer by ankor@dixie-net.com(22740)

Question 681863: If P is a point on the circle x2+y2=9 and Q is a point on the line 7x+y+3=0 and the line is perpendicular bisector of line PQ, find the coordinet of P.

Click here to see answer by KMST(5328)

Question 682628: If P is a point on the circle x2+y2=9,Q is a point on the line 7x+y+3=0 and the line y=x+1 is the perpendicular bisector of PQ then find the coordinate of P.

Click here to see answer by KMST(5328)

Question 683784: A tricycle tire has a diameter of 24 in. How many feet does the tricycle travel when the wheel makes five revolutions? Round to the nearest hundredth.
Click here to see answer by Alan3354(69443)

Question 684055: Suppose the radius of a circle is 2. What is its circumference?
Click here to see answer by lynnlo(4176)

Question 687468: Show that the tangents to the circle x^2+y^2=100 at the points (6,8) and (8,-6) are perpendicular to each other.
Click here to see answer by Edwin McCravy(20054)

Question 687610: If the angle of a segment of circle is 25 degrees what is its radius?
Click here to see answer by Alan3354(69443)

Question 687728: Please help me solve this equation:
Decide whether or not the equation has a circle as its graph. If it does, give the center and the radius. If it does not, describe the graph.
x^2+y^2-10x+6y=-25
Click here to see answer by stanbon(75887)

Question 687664: Please answer: The general form of the equation of a circle is In each the below example write the general form of the equation of the circle with the given centre and radius: centre (2,3); radius 4
Click here to see answer by KMST(5328)

Question 687905: Please answer:
Give the center and radius of the circle:

Click here to see answer by fcabanski(1391)

Question 687969: Please help....
In the example below give the centre and radius of the circle.

Thank you
Click here to see answer by jim_thompson5910(35256)

Question 687969: Please help....
In the example below give the centre and radius of the circle.

Thank you
Click here to see answer by lwsshak3(11628)

Question 543093: at a carnival samantha plays a dart game that has a $100 gift certificate prize. To win the game, sam has to hit a 1-inch-radius cirle on the 9-inch-radius cirlce dart board. if the dart is equally likely to hit anywhere on the board what is the percentage probabilty of sam's winning (round the percentage to the nearest tenth) if each dart thrown costs $2 and the game is played 1000 times would the game win or loose money for the player? how much?
Click here to see answer by AxasSuoh(1)

Question 692844: A pleasant day Sir/ Madam, my daughter has this problem in geometry and I am not good in geometric proofs, can you please help me?
the illustration or drawing is a rectangle inscribed in a circle
Given: Quadrilateral ABCD is a rectangle
Prove: line segment AC and line segment BD are diameters of the circle
Thank you very much for anyone who can help me!
Click here to see answer by MathLover1(20849)

Question 692963: find the circumference of a circle wth radius 7 in
Click here to see answer by jim_thompson5910(35256)

Question 692963: find the circumference of a circle wth radius 7 in
Click here to see answer by fcabanski(1391)

Question 692963: find the circumference of a circle wth radius 7 in
Click here to see answer by RedemptiveMath(80)

Question 692951: Find the circumference in each circle using pi 3.14 if necessary round to he nearest tenth
r=5 m
d=2.1 in.
d= 2 m
r=4.7ft
Click here to see answer by Alan3354(69443)

Question 694253: find the center and radius of a circle (3x^2)+(2x)+(3y^2)-(7y)-(10)=0 I would like to see the steps as you go along to see how you find the answer. Thank you so much!
Click here to see answer by KMST(5328)

Question 695812: Solve the system algebraically.
x^2+y^2+2x+4y-8=0
3x+2y=6
I wasn't really sure how to solve this so I started, but I sort of got stuck...
2y=-3x+6
y=-(3/2)x+3
x^2+(-3/2x+3)^2+2x+4(-3/2x+3)-8=0
...then I got stuck.
Click here to see answer by KMST(5328)

Question 697077: I have 100 points on a circle and connect every point with the other 99. What is the maximum number of intersection points I will have in the circle?
I have figured out that I have 4950 chords. Two chords which is 4 points are needed to have an intersection. I am stuck on this.
thanks
Tyler
Click here to see answer by jim_thompson5910(35256)

Question 697128: Find the exact area of a shaded region. One angle is 120 degrees

Click here to see answer by Alan3354(69443)

Question 697432: Find an equation of the circle whose diameter has endpoints(-3,6) and (5,4) .
Click here to see answer by Alan3354(69443)

Question 697522: Given circle T; and a point P outside of T;, 2 lines l1 and l2 are drawn such that both pass through P. l1 intersects T; at A and B, and l2 intersects T; at C and D, with C between D and P. If PA=44,PB=294 and PC=56, what is PD?
Click here to see answer by Edwin McCravy(20054)

Question 697836: radius 3; in the first quadrant and tangent to both axes.
find the general form of a circle

Click here to see answer by Alan3354(69443)

Question 698319: Dear Tutor, may you please help me on this problem:
The wheels of a bicycle made 50 revolutions to travel a distance of 88 m. If the wheels of this bicycle are identical, what is the diameter of the wheel?
Distance covered in one revolution=_____________m=______m
Diameter of the wheel =______________m= _______m
Thank you!
Click here to see answer by lwsshak3(11628)

Question 698318: Dear Tutor, may you please help me on this problem? May you also show me the steps so I can understand the steps on how to do this proem, thank you!
The circumference of a circle is 88cm. Find the area of the circle. (π(pi)=22/7)
Let the radius of the circle be r,
________________________ r=________
Area of the circle=_______________=________
Thank You!
Click here to see answer by neatmath(302)

Question 698355: diameter of cycle wheel is 49.find in how many rounds cycle wheel covers distance of 6.16 km?
Click here to see answer by Alan3354(69443)

Question 698438: If the segment connecting (−6, −5) and (4, −3) is the diameter of the circle, what are the coordinates for the center?

Click here to see answer by jim_thompson5910(35256)

Question 698670: The circles center is at (2,2)and contains (6,5). What is the length of the diameter
Click here to see answer by stanbon(75887)

Question 699282: I have a question that goes like this: The school board has voted to have the school track repaved, what is the total expense if the charge is $3.20 per square foot? It also says to use 3.14 for pi. the track is a outer rim and has a diameter (i guess thats what its called) of 20 feet the inside circle has a radius of 200 feet.
Please help, my mom started yelling at me because of it so please help!
I have the equation its just that I really dont understand how to plug in the numbers and actually solve the problem.
If you happen to reply thanks!
Click here to see answer by solver91311(24713)

Question 699124: circle p has a diameter with endpoints at (-4,3)and(1,6).find the center of the circle
Click here to see answer by KMST(5328)

Question 699513: The area of a circle is 100 times the area of another circle. What is the ratio of their circumferences?

Click here to see answer by thair(3)

Question 700877: A chord of length 16 sqrt3 is the perpendicular bisector of the radius in a circle. Determine the area of the circle.Please show me the steps
Click here to see answer by ankor@dixie-net.com(22740)

Question 701020: I have a circle with a diameter of 36 km
How do i work this problem.?

Click here to see answer by solver91311(24713)

Question 702069: Write the general form of the equation of the circle.
Center: (0, 0); radius: 5
Click here to see answer by RedemptiveMath(80)

Question 702069: Write the general form of the equation of the circle.
Center: (0, 0); radius: 5
Click here to see answer by sachi(548)

Question 702862: Can someone please help with the following, and explain formula to get answer, I'm so lost.
Circumference = 12 meters, length of arc AB = 4 meters, find the measure of the central angle ACB.
and
circumference = 18 feet, measure of angle ACB = 60 degrees. Find the length of arc BD.
Click here to see answer by Alan3354(69443)

Question 702838: what is the center and radius of the circle
(x-5)^2+y^2=6
Click here to see answer by jim_thompson5910(35256)

Question 702895: Anyone willing to tackle these two:
Please explain process. Bless you.
circumference = 240 inches; length of arc AB = 40 inches.Find the measure of the central angle ACB.
and
measurement of angle ACB = 30 degrees; length of arc AB = 100 millimeters, find the circumference.
Click here to see answer by Alan3354(69443)

Question 703127: on the line x + 2y = 3, find the points at a distance 5 from (1,6)
Click here to see answer by josgarithmetic(39617)

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