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

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Question 92916: Give the center of the circle with equation x^2+2x+y^2+22=0
I�ve come up with the answer to be (-1,0) is this right?

Click here to see answer by chitra(359)

Question 93066: you are in charge of constructing a fence around the running track at a high school. the fence is to be built around the track so that there is a uniform gap between the outside edge of the track and the fence.

what is the maximum width of the gap between the track and the fence if no more than 630 meters of fencing is used?
Click here to see answer by scott8148(6628)

Question 93279: solve for r
c=2x3.14xr
Click here to see answer by checkley75(3666)

Question 94328: Please help me: It says to Complete the square to find the center of the radius of the given circle.Could you show me the steps in completing this.
A
B
Thank you
Click here to see answer by Earlsdon(6294)

Question 95114: The question is: Find the missing angle measure, when the radius is 6 and the arc length is 3pi/2
Click here to see answer by scott8148(6628)

Question 95177: 1. what is the circumference of a circle with a diameter of 30 centimeters?
2. for a botton to fit through its bottonhole, the hole needs to be the size of the botton's diameter. what size bottonhole is needed for a botton with a circumference of 9.42 centimeters?
3. The spoke of a wheel reaches from the center of the wheel to its rim. if the circumference of the rim of the wheel is 42 inches, how long is each spoke? round to the nearest hundreth.
Click here to see answer by checkley71(8403)

Question 47144: i need help with this +18.5 +4to the 3 power+65/6
Click here to see answer by checkley71(8403)

Question 96731: Ri rides his bicycle to school every day.The diameter of his bicycle wheel is 70 cm when pumped full air.
a)What is the circumference of his bicycle when the wheel is pumped?
b) When the tire on rick's bicycle is flat, the diameter is only 60cm. What is the circumference?
c) Estimate how long the spokes are on rick's bicycle?
Click here to see answer by checkley71(8403)

Question 97766: Travelers have reset their watches only when the time change equals 1.0h. How far on the average must you travel in degrees of longitude until your watch must be reset by 8 hours?
Click here to see answer by stanbon(75887)

Question 98623: Assuming that a planet is a perfect sphere with a circumference of 20771 km and an average density of 2.41 g/mL, what is its approximate mass?
Click here to see answer by Nate(3500)

Question 98834: A circular track has a circumference of 125 yards. When Tom has run a 30 degree arc, what distnace has he run?
Click here to see answer by stanbon(75887)

Question 100500: What is the circumference of a circle with a diameter of 30 centimeters
Click here to see answer by ptaylor(2198)

Question 101360: find the area of a circle with a diameter of 13cm.
Click here to see answer by jim_thompson5910(35256)

Question 102174: A given circle has a radius of 6. The area of the largest circle that can be inscribed in a semicircle of the given circle can be written as k(pie). Find the value of k.
Click here to see answer by checkley75(3666)

Question 101923: If an area in the form of a circle is to be roped off by a rope 10 meters long, what will be the radius of this area
Click here to see answer by ankor@dixie-net.com(22740)

Question 103312: the circumference of a circle is 6 pie meters. find the radius of the circle
Click here to see answer by stanbon(75887)

Question 103523: A wheel has a radius of 8 inches. To reduce wear on the rubber tire, the radius is increased to 10 inches. How many more inches, rounded to 4 significant digits, will the new tire go on each revolution?
Click here to see answer by checkley75(3666)

Question 103528: Find the degree measure of the angle formed by the minute hand and the hour hand when it is 1:27
Click here to see answer by ankor@dixie-net.com(22740)

Question 103855: What would be the radius of a circle with a diameter of 8 inches?
Click here to see answer by stanbon(75887)

Question 103859: What is pi? The numbers
Click here to see answer by Earlsdon(6294)

Question 103858: What would be the radius of a circle with a diameter of 8 inches?
Click here to see answer by edjones(8007)

Question 105201: A bicycle wheel has a radius of 1.2ft. A complete rotation of the wheel equals the circumference of the wheel. Which expression shows the distance the bicycle will cover in 10 complete rotations?
A. (10 X 1.2) ft
B. (10 + 2.4 pie)ft
C. (10 X 2.4 pie) ft
D. (10 X 1.2pie) ft
Thanks again
Click here to see answer by edjones(8007)

Question 105793: what is the area of a circle with the circumfrance of 20
Click here to see answer by edjones(8007)

Question 105773: Find the radian measure for two positive and two negative angles that are coterminal with the angle 2
Click here to see answer by stanbon(75887)

Question 105859: A pizza sells a 9 in diameter pizza for $8.00. What is a fiar price for a 13" diameter pizza?
Click here to see answer by edjones(8007)

Question 106235: Find cos(a), given that sin(a) = 0 and cos(a) < 0.
Click here to see answer by edjones(8007)

Question 106350: Please help me solve this equation: There is a square and its area is 252. The square has 9 circles in it and you need to find the area of the circles added together. Could u show me how to do the problem please A.S.A.P. Thank you
Click here to see answer by stanbon(75887)

Question 107159: Flower Bed Find the area of a circular flower bed whose diameter is 6 meters (use 3.14 as and approximate value.
2. find the area of a triangle whose altitude is 7 ft and whose base is 22ft.
3. 18 less than a number is 23 what is the number
Click here to see answer by Annabelle1(69)

Question 107270: Perform conversion
150 ft/sec = ___ mile/hr
Click here to see answer by bucky(2189)

Question 107333: Find the circumference of a circle with radius 8.
Click here to see answer by elima(1433)

Question 108334: what is the volume of a 10" diameter ball?
Click here to see answer by stanbon(75887)

Question 109681: find the center of the circle x^2+y^2+12x-4y+20=0
Click here to see answer by stanbon(75887)

Question 109696: find the equation of the axis of symmetry of the parabola f(x)=3x^2+24x+47
Click here to see answer by jim_thompson5910(35256)

Question 109696: find the equation of the axis of symmetry of the parabola f(x)=3x^2+24x+47
Click here to see answer by stanbon(75887)

Question 111132: What is the diameter of a circle whose radius is 3.6 meters?
Click here to see answer by dolly(163)

Question 111757: if sphere:ball then
a]circle:disc
b]cube:dice
c]line:rope
d]none of these
tick the correct answer and justify your answer.
Click here to see answer by jim_thompson5910(35256)

Question 111928: What is the area of a circle if the radius is 3.5cm
Click here to see answer by jim_thompson5910(35256)

Question 112226: Circle J has a radius of 6 in. Radii JK and JL form an angle that is not a straight angle. The length of KL is not 6in. Classify JKL according to its sides.Make a diagram if possible.

Thanks a whole lot!
Click here to see answer by scott8148(6628)

Question 112403: Find the area, use pie = 3.14, and the radius of the circle is 2.05 ft?
Click here to see answer by uma(370)

Question 112452: If the circumference of a circle is 3 meters than what is the diamiter and what is the radius?
Click here to see answer by SHUgrad05(58)

Question 113209: Homework questions: The area of a circle is found by the equation A=pie*r^2. If the area A of a certain circle is 81pie square centimeters, find its radius r. I need to know how to figure this to be able to get the answer.
Click here to see answer by Earlsdon(6294)

Question 113212: Homework question: A circular pool measures 14 feet across. One cubic yard of concrete is to be used to create a circular border of uniform width around the pool. If the border is to have a dept of 1 inch, how wide will the border be? Use 3.14 to approximate pie. Express your solution rounded to two decimal places. (1 cubic yard=27cubic feet)I would like to see how this is worked out, not just get an answer. Thank you!
Click here to see answer by solver91311(24713)

Question 113253: find the area of the circle if its radius is 3.5cm

Click here to see answer by SHUgrad05(58)

Question 113670: Find the center and radius of the circle. (x+3)^2 +(y-1)^2=81
Click here to see answer by stanbon(75887)

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