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

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 Geometry: Circles and their properties Solvers Lessons Answers archive Quiz In Depth

 Question 305000: I have been working on this math problem and i can't seem to figure it out. I was wondering if someone could help me? Please and Thank You!! I deeply appreciate it!! A regular square pyramid with base edge 4 cm is inscribed in a cone with height 6 cm. What is the volume of the cone? Click here to see answer by richwmiller(9135)

 Question 305018: what is the approximate circumference of the square if it has a radius of 3.2 Click here to see answer by richwmiller(9135)

 Question 305942: if the circumference of a circle is 104 inches, how long is a 45 degrees arc? Click here to see answer by Fombitz(13828)

 Question 305948: Joey has a beach ball with a radius of 20 cm. What volume of air will it hold when fully inflated? Click here to see answer by checkley77(12569)

 Question 306301: PLease help me solve this it doesnt show how to in my notes. : I need to know how to find the Arc Length Click here to see answer by Fombitz(13828)

 Question 306307: I need to find the arc length of Thanks ! Click here to see answer by Earlsdon(6287)

 Question 306405: What is the radius if the circumference is: 4x-10pi (5/2)pi 14pi (x + y)pi I have previously completed these problems. However, my answers were deemed incorrect. I would be grateful for assistance. Cheers! Click here to see answer by checkley77(12569)

 Question 306956: If the length of an arc is 6 pi m what is the radius? Click here to see answer by solver91311(16868)

 Question 307236: a chord of a circle has length 4.2 cm and is 8cm from the center f the circle. what is the radius of the circle to the nearest hundereth Click here to see answer by mananth(12270)

 Question 307349: I don't understand this. It says: The diameter of circle F 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 ankor@dixie-net.com(15638)

 Question 307394: Point C is the center of the circle. What is the measure of angle ACB if the measure of arc ADB is equal to 201 degrees Click here to see answer by rapaljer(4667)
 Question 307394: Point C is the center of the circle. What is the measure of angle ACB if the measure of arc ADB is equal to 201 degrees Click here to see answer by unlockmath(1599)

 Question 307817: how to find degrees in a cicumference. my husband is taking ged test so if you could explain this as simple as you can would be great, thanks Click here to see answer by scott8148(6628)

 Question 307925: x^2+y^2-8x-16y+44=0 i need to find the center and radius of this circle. Click here to see answer by Alan3354(30983)

 Question 308309: What is the formula please to find the radius of a sphere when you know the volume? Thanks for your help with this. Click here to see answer by mananth(12270)
 Question 308309: What is the formula please to find the radius of a sphere when you know the volume? Thanks for your help with this. Click here to see answer by Alan3354(30983)

 Question 308328: 3x^2+3y^2+30x+30y+150=0 A circle is difned by the following equation: What are the coordinates of its center? Click here to see answer by Fombitz(13828)

 Question 308325: 3x^2+3y^2+30x+30y+150=0 a circle is difined by the following equation: what are the coordinates of its center Click here to see answer by Fombitz(13828)

 Question 308400: in the circular region, the two sections comprise 3/7 and 1/3 of the area of the circle. What fractional part of the circle's is unknown? Click here to see answer by rfer(12647)

 Question 308671: a circle is defined by the following equation: 2x^2+2y^2+28x+80=0 what are the coordinates of its center Click here to see answer by Fombitz(13828)

 Question 308572: four circles of radius 1 are inscribed in a larger circle. The large circle is tangent to every smaller circle. Each small circle is tangent to the large circle and to two small circles. What is the radius of the large circle? Click here to see answer by Fombitz(13828)

 Question 308709: what is the formula for finding the area of a shaded region in a circle ? Click here to see answer by Fombitz(13828)

 Question 308771: Write the equation of each circle: The endpoints of the diameter are (-2,1) and (8,25) I need help with the problem above. I've tried to solve it using distance formula and I got the radius to be 13. I used midpoint formula to find the center of the circle and found it to be (3,13). For my final equation I got: (x-3)^2+(y-13)^2=169 I just need someone else to check my work with to make sure it is correct because this homework is graded. Thank you! Click here to see answer by rapaljer(4667)
 Question 308771: Write the equation of each circle: The endpoints of the diameter are (-2,1) and (8,25) I need help with the problem above. I've tried to solve it using distance formula and I got the radius to be 13. I used midpoint formula to find the center of the circle and found it to be (3,13). For my final equation I got: (x-3)^2+(y-13)^2=169 I just need someone else to check my work with to make sure it is correct because this homework is graded. Thank you! Click here to see answer by stanbon(57246)

 Question 308791: The directions state to write the equations of the following lines and leave the answer in standard form. The problem states: a line perpendiciular and containing point (-2,-4) For this problem, I am aware of the fact that if a line is perpendicular to another line, their slopes are opposite recipricols. Although, I am not sure what the slope would be or the final equation. Please help! This is a graded mathe assignment! Click here to see answer by stanbon(57246)
 Question 308791: The directions state to write the equations of the following lines and leave the answer in standard form. The problem states: a line perpendiciular and containing point (-2,-4) For this problem, I am aware of the fact that if a line is perpendicular to another line, their slopes are opposite recipricols. Although, I am not sure what the slope would be or the final equation. Please help! This is a graded mathe assignment! Click here to see answer by Fombitz(13828)

 Question 308766: What is the radius and the center for a circle with the following equation: (x+4)^2+y^2=37 Click here to see answer by stanbon(57246)

 Question 308795: I used the formula (x-h)^2 +(y-k)^2=r^2 to determine the equation of the circle. I got c=(4,0)r=sqrt 13 (x-4)^2+(y-0)^2=(sqrt13)^2 (x-4)^2=(y-0)^2 =13 but now I have to determine where the circle intersects the x-axis using a system of equations. Can you please show me how to do this. Click here to see answer by stanbon(57246)
 Question 308795: I used the formula (x-h)^2 +(y-k)^2=r^2 to determine the equation of the circle. I got c=(4,0)r=sqrt 13 (x-4)^2+(y-0)^2=(sqrt13)^2 (x-4)^2=(y-0)^2 =13 but now I have to determine where the circle intersects the x-axis using a system of equations. Can you please show me how to do this. Click here to see answer by Fombitz(13828)

 Question 308823: Whats the equation for a line whose x-intercept is 8 and whose y-intercept is 6? Click here to see answer by solver91311(16868)

 Question 308858: what are the x-and y-intercepts of the tangents to the circle (x-2)^2+(y-2)^2=25 Click here to see answer by Alan3354(30983)

 Question 309023: Two angles are complementary. the measure of the larger angle is 10 degrees more than three times the measures of the smaller angle. find the measures of these two angles Click here to see answer by arora_nb(1)
 Question 309023: Two angles are complementary. the measure of the larger angle is 10 degrees more than three times the measures of the smaller angle. find the measures of these two angles Click here to see answer by mollukutti(30)
 Question 309023: Two angles are complementary. the measure of the larger angle is 10 degrees more than three times the measures of the smaller angle. find the measures of these two angles Click here to see answer by MathTherapy(1421)

 Question 309265: nathan drew a circle on a grid with a radius of 4 units and the points 2,-1 as its center. What are the pairs of coordinates represented points on the circle Click here to see answer by stanbon(57246)

 Question 309357: what is the circumference and area of a circle d=7.9 Click here to see answer by nyc_function(2733)

 Question 309472: If the length of an arc is 18(pi) meters and the central angle measures 75 degrees, find the radius of the circle. Click here to see answer by stanbon(57246)
 Question 309472: If the length of an arc is 18(pi) meters and the central angle measures 75 degrees, find the radius of the circle. Click here to see answer by Theo(3458)

 Question 310641: find the radius r and the center (h,k) of the following circle 3(x-3)^2 + 3y^2 = 75 Click here to see answer by nerdybill(6950)
 Question 310641: find the radius r and the center (h,k) of the following circle 3(x-3)^2 + 3y^2 = 75 Click here to see answer by Fombitz(13828)

 Question 310663: If angle ema is 95 degrees, what is the measure of angle bme? I would be grateful for any assistance with this problem. Cheers! Click here to see answer by solver91311(16868)

 Question 310855: Show that the equation represents a circle, and find the center and radius of the circle. 2X^2 + 2Y^2 - 3X = 0 Click here to see answer by solver91311(16868)

 Question 310914: what is the exact circumference of a circle with a diameter of 27 inches? Click here to see answer by Fombitz(13828)

 Question 311269: two identical circles which are inscribed in a square of side 10cm touch each other as shown. find the radius of one of the circles Click here to see answer by Edwin McCravy(8882)

 Question 311388: Find the radius of a circle in which an inscribed square has a side of 8 inches. Click here to see answer by Alan3354(30983)

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