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

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Question 1103135: DESPERATE HELP NEEDED. Can anybody help me with grade 12 geometry?
I have a grade 12 geometry maths assignment to do and I've been attempting it for weeks. I managed to do sections like finding the equation of a line and statistics, but I''m having problems with circle geometry. I don't know anything, none of my friends are helping. Its due in a few days. Please please please send me your email so i can send you the assignment as soon as possible. You don't have to be able to answer everything - i'll be intensely grateful for anything really.
Click here to see answer by richwmiller(17219) About Me 
Question 1103351: A circle has a radius of 1.35 meters. Wire costs 2 cents per centimetre. How much will it cost to stretch a wire between two points on the circle if it passes through the centre?
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Question 1103512: What is the area of a circle if the length of the diameter is 14cm
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Question 1103516: what is the circumference of a circle whose radius is five
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Question 1103514: what is the area of a circle if the circumference is 24π
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Question 1104162: The area of a circle is the same as the area of a square whose side is 5cm. The radius of the circle is closest to what number?
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Question 1104163: The area of a circle is the same as the area of a square whose side is 5cm. The radius of the circle is closest to what number?
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Question 1104866: How far does the tip of the second hand of a clock move in 25 seconds if its length is 7 cm? Express your answer in terms of pi.
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Question 1104868: How long will it take for the tip of the second hand to move 10 cm if its length is 7 cm? Round off your answer to the nearest hundredths.
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Question 1104864: Nicole's fan has an arc length of 38 cm and subtends a central angle of 120 degrees. What is the length of the radius of the fan? Express your answer in terms of pi.
Click here to see answer by ankor@dixie-net.com(22740) About Me 
Question 1104873: If a circular pizza, 6 inches in diameter serves one person, then how many circular 18-inch diameter pizzas are needed for a party of 36 people?
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Question 1104881: In the figure given below, triangle BAC is inscribed in a semi circle with BC = 73. Semi circles are constructed outside the triangle, with diameter AB = 48 and AC = 55. Find the area of the shaded region inside the two smaller semi circles but outside the larger circle.
http://www.smartlearning.in/new_stsquestion.php?QuestionID=73640&page=1
(please disregard the measurements given in the figure (3 cm and 4 cm) and follow whats stated on the word problem above)




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Question 1104952: A tractor has a rear wheel with a circumference of x m. The circumference of the front wheel is 2 m less. If the front wheel makes 12 more revolutions than the rear wheel every 480 m, what is the circumference , in m, of the front wheel?
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Question 1105375: Find the equation of parabola, find the two points that defines the latus rectum and graph of the equation. Focus at(2,-5) vertex(2,-3)
Click here to see answer by josgarithmetic(39613) About Me 
Question 1105833: The circle x^2+y^2-4x-6y=0 cuts the x-axis at A and y-axis at B. A line y=5 cuts the circle at P and Q. Find the coordinates of A and B, then find the coordinates of P and Q. Finally find ∠OQA
Thank you!
Click here to see answer by Edwin McCravy(20054) About Me 
Question 1105836: AD and DB are tangents to the circle and BC is the diameter. If angle ADB = 110 degrees, find angle ACB and give your reasons
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Question 1105870: The figures below are based on semicircles and squares. Find the perimeter and the area of each shape. Give your answer as a completely simplified exact value in terms of π (no approximations).
http://homework.russianschool.com/cms/resource?key=40595j1oa70ra
That is the picture, and thank you!
Click here to see answer by Alan3354(69443) About Me 
Question 1105914: If the lengths of the bases of an isosceles trapezoid is a circle are 10 cm and 22 cm, and if one of the legs is 10 cm, then what is the length of the diagonal in cm?
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Question 1106516: an office needs to buy a circular pizzas for 20 employees. if each pizza is cut into equal slices and each slice has a central angle of 40 degree what is minimum number of pizzas that need to be ordered so that each employee gets at least two slices of pizza.
?
Click here to see answer by Theo(13342) About Me 
Question 1106557: Find the radius of a circle whose circumference is 57.2 cm. (Take π=22/7)
Click here to see answer by Alan3354(69443) About Me 
Question 1106644: Determine the solution(s) in 0 <= theta < 2pi, in radians measure , for the equation : sec theta=-2/sq rt 3
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Question 1106790: find the number b such that the vertex of the parabola y= x²+bx+c lies on the y-axis
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Question 1106795: the equation of a line 3x-2y=20 what point on the line is equidistant from the points A(1,-1) and B(1,8)
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Question 1106795: the equation of a line 3x-2y=20 what point on the line is equidistant from the points A(1,-1) and B(1,8)
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Question 1106794: the point (2,-5) is a vertex of square one whose sides lies on the line x-2y=7 calculate the area of square
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Question 1106797: find the equation of the circle containing the points P(0,-3) and Q(4,0) and whose center is on the line x+2y=0
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Question 1106792: find the number b such that the parabola y²+2y-bx-3=0 passes through (-6,3)
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Question 1106860: Find an equation of the circle whose diameter has endpoints
5,6 and -3, -4
.

Click here to see answer by josgarithmetic(39613) About Me 
Question 1106895: Write the standard form of the equation and the general form of the equation of the circle with radius r and center​ (h,k). Then graph the circle.
r= 3, (h,k)= (0,3)
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Question 1106916: the equation of line 3x-2y =20 what point on the line is equidistant from the points A(1, -1) and B(1, 8)
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Question 1106915: find the b such that the vertex of parabola y² + 2y - bx -3 passes through (-6,3)
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Question 1106915: find the b such that the vertex of parabola y² + 2y - bx -3 passes through (-6,3)
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Question 1106914: find the number b such that the vertex of the parabola y= x²+bx +c lies on y-axis
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Question 1106917: the diameter of a circle is given as 10cm, correct to the nearest cm. find the maximum possible circumference and area with this data
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Question 1107007: “Three concentric circles have radii of a, 2a, and 3a. Find the area of the outer ring and the middle ring.” I think the outer area is A=pi(3a)^2 and the middle area is A=pi(2a)^2, but I’m not very sure.
Click here to see answer by ikleyn(52747) About Me 
Question 1107104: A circle with centre (2,-3) has a tangent of 24x+7y-12=0. Find the equation of the circle
I have no idea how to do this question, please send help!
Click here to see answer by Alan3354(69443) About Me 
Question 1107104: A circle with centre (2,-3) has a tangent of 24x+7y-12=0. Find the equation of the circle
I have no idea how to do this question, please send help!
Click here to see answer by Edwin McCravy(20054) About Me 
Question 1107302: The circle with equation
x²+y²-4x-6y+9=0 touches the y-axis.
Find
(a) the coordinates of the point of contact.
(b) the length of the tangent to the circle from the origin.
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Question 1107298: sin pie/6
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Question 1107298: sin pie/6
Click here to see answer by Alan3354(69443) About Me 
Question 1107405: My friend made up this geometry problem:
https://image.ibb.co/eOzrrw/Problem.jpg
Find the radius of Circle A.
If there is no logical way to solve the problem, please explain why.
Click here to see answer by ikleyn(52747) About Me 
Question 1107785: Consider two circles, a smaller one and a larger one. If the larger one has a radius that is 10 feet larger than that of the smaller circle and the ratio of the circumferences is 6 colon 1, what are the radii of the two circles?
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Question 1107790: Center (-1,3) and tangent to the line y=2
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Question 1108201: A circle of largest area is cut from a rectangular piece of cardboard with dimensions 55cm and 42cm.Find the ratio between the area of the circle cut and the area of the remaining cardboard
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Question 1108280: Arthur wants a circular table, so that’s 12 chars each 16 inches wide can be placed around it with at least 8 inches between chairs. What should the diameter be of the table
Click here to see answer by ikleyn(52747) About Me