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

Tutors Answer Your Questions about Circles (FREE)

Question 737060: In the circle, central angle AOB measures 45 degrees the arc is AB 3.14 cm long. How many cm is the radius?
Click here to see answer by ankor@dixie-net.com(22740)

Question 737362: The diameter of a construction pipe is 3ft. If the pipe is 16ft long, what is its volume?
(Use the value for 3.14 , and round your answer to the nearest cubic foot. Be sure to include the correct unit in your answer.)
Click here to see answer by sachi(548)

Question 737531: In the diagram below, ΔABC is circumscribed about circle O and the sides of ΔABC are tangent to the circle at points D, E, and F.
http://imageshack.us/photo/my-images/849/geou.png/
If AB=20, AE=12, and CF=15, what is the length of AC?
Click here to see answer by MathLover1(20849)

Question 737932: In the diagram below, point M is located on AB.
http://imageshack.us/photo/my-images/32/pointm.png/
Sketch the locus of points that are 1 unit from AB and the locus of points 2 units from point M. Label with an X all points that satisfy both conditions.
Click here to see answer by lynnlo(4176)

Question 738021: If the area of a circle is 4(pi) inches square, what is the diameter of the circle?

Click here to see answer by Alan3354(69443)

Question 738056: We have to graph the circle for this situation: It is tangent to the y-axis with a radius of 2 and the center is on line y=2x
I know the basic formula for graphing circles but I don't know how to find the equation with only this information. Please help :)
Click here to see answer by josgarithmetic(39617)

Question 738620: Find the equation of the circle passing through the points (4, 1) and (6, 5) and whose centre is on the line 4x+y=16.
Click here to see answer by fcabanski(1391)

Question 739122: Find K so that the circle X2+y2+kx+4y-5 will pas through the point (5,1).
Click here to see answer by MathLover1(20849)

Question 739209: an ellipse x^2/(4c^2) + y^2/(c^2) = 1 and a circle x^2 + y ^2 = 9a^2 cuts at 4 points. then the relation between a and c is
Click here to see answer by josgarithmetic(39617)

Question 739873: a wheel has a diameter of 12 inches. to the nearest foot, how far will the wheel travel in 50 revolutions?
a. 148ft
b. 156ft
c. 168ft
d. 446ft
Click here to see answer by Alan3354(69443)

Question 739871: the length of an arc of a circle is 12 cm,the corresponding sector area is
108 cm^2.
Find the radius of the circle and the angle subtended at the centre of the circle by the arc.
Click here to see answer by josgarithmetic(39617)

Question 739872: What is the radius of a circle if a chord of the circle that is 16 centimeters long is 6 centimeters from the center of the circle?
a. 6cm
b. 8cm
c. 10cm
d. 16cm
Click here to see answer by Alan3354(69443)

Question 739895: what is the circumference of a circle that has a diameter of 8 10/11 cm? use 22/7 for pi
Click here to see answer by Alan3354(69443)

Question 739886: 6.
Two parallel chords 16 centimeters and 30 centimeters long
are 23 centimeters apart. Find the length of the radius of the
circle.

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

Question 740162: MY QUESTION IS:
JUST OUTSIDE THE PICNIC SHELTER IS A FOUNTAIN. THE BASE OF THE FOUNTAIN IS CIRCULAR WITH A DIAMETER OF 5 FEET. AROUND THE FOUNTAIN IS A FLAGSTONE WALKWAY WHICH IS 18 INCHES WIDE. ON THE OUTSIDE OF THE WALKWAY, YOU NEED TO INSERT SMALL FENCE.
1) HOW MUCH FENCING DO YOU NEED?
2) IF FENCING COSTS $4 PER YARD, HOW MUCH WILL IT COST?
Click here to see answer by MathLover1(20849)

Question 740531: 11. Write the standard equation of the circle with center (-3, 5) and a diameter of 18.
I am begging anyone for help with this please !
Click here to see answer by htmentor(1343)

Question 740785: please help find X
http://screencast.com/t/YUwLICxkhP9l
Click here to see answer by lynnlo(4176)

Question 741157: Hello I need help on finding the circumference of a circle whose equation is: x^2 + y^2 = 16, the symbol ^ means squared.
Click here to see answer by stanbon(75887)

Question 741225: Discs of radius 4 cm are cut from a rectangular plastic sheet of length 84cm and width 24cm.How many complete discs can be cut out?

Click here to see answer by mananth(16946)

Question 741418: one side of a square is increased by 30% to maintain the same area ,the other side will have to be decreases by
Click here to see answer by ankor@dixie-net.com(22740)

Question 741826: How do you find the radius of a circle when one given side is 12
Click here to see answer by Alan3354(69443)

Question 741956: Evaluate the six circular function values of θ for the given unit circle.
The image shows a circle with an acute angle of θ.
(Sorry, for the explanation. Been having trouble with the Unit Circles and Circular Functions lesson.
Click here to see answer by stanbon(75887)

Question 741991: If the diameter of the circle above is 6 cm, what is the area of the circle?
Click here to see answer by only4christ(12)

Question 742013: (x^2)+25=10x
What steps do I need to do to find x? It has been explained to me that I need to "factor" something out, but I am not sure what or any kinds of steps I need to take to even start solving. Thanks.
Click here to see answer by ankor@dixie-net.com(22740)

Question 742483: Write an equation for each circle. A circle with center at (-2,-7) and a radius with endpoints (0,7)
Click here to see answer by MathLover1(20849)

Question 742628: Need to solve this problem:
The circle in tangent to the line with equation x + 3y = -2 and has its center at (5,1).
Click here to see answer by josgarithmetic(39617)

Question 742628: Need to solve this problem:
The circle in tangent to the line with equation x + 3y = -2 and has its center at (5,1).
Click here to see answer by mananth(16946)

Question 742631: a circle with centre(-3,-5)has one end of its diameter at (5,-3) find other end of the diameter.
Click here to see answer by mananth(16946)

Question 742984: Two circles lying in the first quadrant, touch each other externally. Both the axes makes tangents with both the circles. If the distance between the two centre of the circles is 8 cm, find the difference in their radii
Click here to see answer by Edwin McCravy(20054)

Question 743651: A twelve inch pizza is cut into eight congruent pieces. What is the length of outer crust on each piece of pizza?
Click here to see answer by tommyt3rd(5050)

Question 743651: A twelve inch pizza is cut into eight congruent pieces. What is the length of outer crust on each piece of pizza?
Click here to see answer by josmiceli(19441)

Question 743928: What is the equation of a circle touching the lines x-3y-11=0 and 3x-y-9=0 and having its center on the line x-2y+19=0 ?

Click here to see answer by Alan3354(69443)

Question 744088: I have to find the diameter of a pizza to the nearest tenth of an inch with this given info. "A large circular pizza is divided into 10 equal slices (sectors). Measuring along the outer edge of the crust for one piece, only, you find it to be 5.25 inches long. What is the diameter of the large pizza to the nearest tenth of a inch?" I have a basic understanding of what to do but I just stuck between a rock and a hard place. Some tips would be appreciated!
Click here to see answer by josgarithmetic(39617)

Question 744819: I have an arc of 7500mm and the chord that intersects each end of the chord is 6800mm. How can I calculate the radius? Thanks.

Click here to see answer by rothauserc(4718)

Question 745003: 5.) The lengths of the legs of a right triangle are consecutive even integers. The numerical
value of the area is three times that of the longer leg. Find the lengths of the legs of the
triangle.
Click here to see answer by savvyhush23(50)

Question 745073: What is the equation of a circle that is congruent to the circle (x-3)^2 + (y+9)^2=1 but is translated 3 units to the left and 2 units down.
Click here to see answer by stanbon(75887)

Question 745075: What is the length of the conjugate axis for the hyperbola x^2-3y^2+3=0
Click here to see answer by savvyhush23(50)

Question 745310: circle inscribed in an isosceles triangle with base 24. find the radius
Click here to see answer by KMST(5328)

Question 745312: three circles are stacked. 3 on the bottom row. Two on the 2nd row. and One on the top. Find the height of the stack if the radius of the circles are 10 cm
Click here to see answer by KMST(5328)

Question 746229: please help me solve this equation ; the circle is divided into 4 parts a,b,c,d where part a & c form a semicircle and part b&d form the other semicircle area of part a to area of part c is in the ratio 1: 3 the area of part b to the area of part d is in the ratio 1:2. the area of part c is bigger than part b by 20 SquareCentimeters find the area of the whole cirle
Click here to see answer by savvyhush23(50)

Question 747277: What is the area of the triangle in the diagram
Click here to see answer by FrankM(1040)

Question 747382: Find the intersection:
4x^2+20x+9y^2-18y-2=0
2x+3-2y=0
Click here to see answer by tinbar(133)

Question 747497: a chord of a circle measures 24 cm.and its distance from the centre is 4 cm.then the radius of the circle is (in cm.)
Click here to see answer by Cromlix(4381)

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