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

Tutors Answer Your Questions about Circles (FREE)

Question 616356: What is the center and the radius of a circle whose equation is x^2+y^2 -4x +14y +28=0 ?
Click here to see answer by lwsshak3(11628)

Question 616347: Each circle is tangent to the other two. If the diameter of the large circle is 12, the area of the shaded region is ________?
Click here to see answer by Alan3354(69443)

Question 616392: a certain cars windsheild wiper clears a portion of a sector as shown at right. if the angle the wiper pivots during each swing is 120 degrees, find the area of the windshield that is wiped during each swing.
Click here to see answer by Alan3354(69443)

Question 616846: a wedged-shaped piece is cut from a circular pizza. the radius of the pizza is 6 inches. the rounded edge of the cust of the piece measuures 4.2 inches. to the nearest tenth the angle of the pointed end of the pizza in radians is ?
Click here to see answer by jsmallt9(3758)

Question 616919: find the center of the circle using these three points (-4,4),(-7,3),(-8,2)
Click here to see answer by richwmiller(17219)

Question 616919: find the center of the circle using these three points (-4,4),(-7,3),(-8,2)
Click here to see answer by EdwinParker(16)

Question 616977: Suppose the circumference of a circle is 15π. What is its diameter?
Click here to see answer by solver91311(24713)

Question 617034: A circular flower garden has a radiusof 16 feet. You want to lay a circular sidewalk 2 feet wide around the entire garden. If the walk will be 3 inches thick, how many cubic yards of concrete will you need?

Click here to see answer by richwmiller(17219)

Question 617029: A gardener wants three rosebushes in her garden to be watered by a rotating water sprinkler. The gardener draws a diagram of the garden using a grid in which each unit represents 1 ft. The rosebushes are at (1, 3), (5, 11), and (11, 4). She wants to position the sprinkler at a point equidistant from each rosebush. Where should the gardener place the sprinkler? What equation describes the boundary of the circular region that the sprinkler will cover?

Click here to see answer by richwmiller(17219)

Question 618306: x^2+y^2+6x-8y-155=0
Find the radius and the center of the circle. For the radius use radicals as needed for an exact answer. For the center type in an ordered pair using fractions and integers as needed.
Click here to see answer by lwsshak3(11628)

Question 618616: One circular table has a diameter of 9ft, and another circular table has a diameter of 14ft. How much greater is the area of the larger table? round to the nearest whole number.
Click here to see answer by lwsshak3(11628)

Question 618718: What are the properties of a circle?
Click here to see answer by richwmiller(17219)

Question 619157: Write the equation of a circle in standard form. find the center, radius, intercepts, and graph the circle. x^2+y^2+16x+18y=-129
Click here to see answer by ewatrrr(24785)

Question 619283: question if the circumference of a cicle with r by c=2nr and n= 3.14 find the circumference when r = 15 meters, so far I have radius = 15 and n= 3.14 so r= 2*15 = 30 Im stuck....I just want to know if on right track.
Click here to see answer by stanbon(75887)

Question 619380: "How do you find x and y intercepts to 5y = 20"
Click here to see answer by Theo(13342)

Question 619874: Find the area of a circle whose diameter is 80 cm. Use pi = 3.14
Click here to see answer by Alan3354(69443)

Question 620306: if a circle has an area of 914 cm how long is the radius and diameter?
Click here to see answer by Alan3354(69443)

Question 620305: if a circle has an area of 914 cm how long is the radius and diameter?
Click here to see answer by Alan3354(69443)

Question 620911: If the area of a circle and its circumference have the same numerical value, what is the length of the radius?
Click here to see answer by solver91311(24713)

Question 621378: Train A leaves the platform at 5 pm at a speed of 120 km/h and train B leaves the same platform on a parallel track in the same direction at 7 30 pm at 144 km/h. After how many hours will train B cross train A?
A)12.5
B)15
C)17.5
D)18
E)20
Click here to see answer by ewatrrr(24785)

Question 621379: Machine A can print 20 posters in a minute and machine B can print 15 posters a minute. How long will it take both of machines to print 945 if they work together?
A)23
B)27
C)29
D)31
E)33
Click here to see answer by ewatrrr(24785)

Question 621381: Which of the following lines is equidistant fro the points (3,8) and (9,6)?
A)x=1/3
B)y=3
C)y=x/3
D)y=-x/3
E)y=3x+8
Click here to see answer by ewatrrr(24785)

Question 621381: Which of the following lines is equidistant fro the points (3,8) and (9,6)?
A)x=1/3
B)y=3
C)y=x/3
D)y=-x/3
E)y=3x+8
Click here to see answer by Alan3354(69443)

Question 621966: equations of a circle with center(-3,0)and radius 20
Click here to see answer by ewatrrr(24785)

Question 622071: A circle that has a radius of 3 meters has a diameter of?

Click here to see answer by vleith(2983)

Question 622955: An equilateral triangle of length 9 cm is inserted in a circle .Find the radius of the circle.
Click here to see answer by mykasha(37)

Question 624039:
Hi
How would you slove this Given DC is a tanent of point e ae =20 and dc =9 what is the measurement of ac
Thank you
Click here to see answer by Alan3354(69443)

Question 625342: How to solve or how to find the central angle?
Click here to see answer by Alan3354(69443)

Question 625348: A circle has its center at the center of a square with 12-inch sides. Using 3.14 for pi, find the area of the square not covered by the circle, then write a ratio of the circle�s circumference to the perimeter of the square.
Click here to see answer by Alan3354(69443)

Question 626093: Find the center and radius of the circle. Write the standard form of the equation.
(4,6); (9,6)
Click here to see answer by Alan3354(69443)

Question 626125: Can a circle be inscribed in a square?
Click here to see answer by Alan3354(69443)

Question 626336: A sphere has a radius of 3 and a hemisphere has a radius of 6. Compare the ratio of the volume of the sphere to the volume of the hemisphere.
I calculated the ratio to be 3^3 : 6^3 = 27: 126 or 1:8 but think I have missed something re the sphere and hemisphere idea.
Please advise.
Thank you
Click here to see answer by jim_thompson5910(35256)

Question 626386: if the circumfren of a circle is 15km then what is radius

Click here to see answer by rfer(16322)

Question 626521: segment AB, which is 25 inches long, is the diameter of a circle. chord PQ meets AB perpendicularly at C, where AC = 16 inches. find the length of PQ.
Click here to see answer by Edwin McCravy(20054)

Question 626741: A circular pizza is 32 inches in diameter and the pizza is cut into 8 equal pieces. What is the area of each piece of pizza?

Click here to see answer by Alan3354(69443)

Question 626884: The diameter of ⊙C is 18 units long. Find the length of an arc
that has a measure of 100. Round to the nearest hundredth.

Click here to see answer by jim_thompson5910(35256)

Question 627051: Endpoints of a diameter: (-1, -6) (1, 6)
Click here to see answer by jim_thompson5910(35256)

Question 629028: is there possibilities of having circle with radius -1?help me out!
Click here to see answer by stanbon(75887)

Question 629078: Write the equation of a circle in standard form, then find the center and radius of the circle with equation

Click here to see answer by meetkisai(17)

Question 629304: http://courses.apexlearning.com/apps/AceWeb/launch2.do?enrollmentID=17506450&outlineID=264856992§ion=0&page=2
Click here to see answer by solver91311(24713)

Question 629812: A penny-farthing bicycle is shown. The radius of the front/small wheel is 0.2m and the bigger/backward wheel is 0.84m. In a journey the front wheel rotates completely 156 times.
a. How far does the bicycle travel?
b. How many complete turns does the rear wheel make?
Click here to see answer by solver91311(24713)

Question 629813: The diagram shows a framework for a target, consisting of 2 circles of wire and 6 straight pieces of wire. The radius of the outer circle is 30 cm and the radius of the inner circle is 15 cm.
Calculate the total length of wire needed for the whole framework.
Click here to see answer by solver91311(24713)

Question 630245: Eight sections of curved railway track can be joined to make a circular track. Each section is 23 cm long. Calculate the diameter of the circle.

Click here to see answer by 55305(86)

Question 630246: Calculate the radius of a circle whose area is equal to the sum of the areas of three?
circles of radii 2 cm, 3 cm and 4 cm.
Click here to see answer by rapaljer(4671)

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