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

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Question 384558: Parallelogram ABCD is inscribed in circle O. Find the measure of angle A.
Click here to see answer by richard1234(5390)

Question 385404: Find the radius of a circle with these three points: (-4,-9),(-8,-9),(-6,-9)and center (-6,-9)
Click here to see answer by Fombitz(13828)

Question 385414: Find the center of the circle defined by the equation: 4x^2+4y^2+24x-56y+168=0.
Click here to see answer by ewatrrr(10682)

Question 385561: Give the equation of the circle with the given center and radius.
Center at (-9, 0); radius = 7)
Click here to see answer by Alan3354(30993)

Question 385641: how do you find the radius of the circle x^2+y^2-2x+4y=4?
Click here to see answer by solver91311(16877)

Question 385778: find the area and circumference of the following circle. if either is not possible to determine say so. assume pie-3.14. the diameter is 8m.
Click here to see answer by rfer(12657)

Question 387197: try to draw or picture this in your head. there is a circle and 4 points going around it in order M, N, O, P. and point Q intersects lines MO and PN. I am given that angle MPN equals 42° and that arc MP equals 100°. I need to find the measure of angle MON and I dont know what to do
Click here to see answer by Edwin McCravy(8908)

Question 387344: What is the exact circumference of a circle with a diameter of 13 inches?
26p inches
6.5p inches
13p inches
42.25p inches
169p inches
I was doing 13*3.14=40.84 but as you can see this is not one of my selections so I am not sure where I am going wrong.

Question #2 want to double check this one

Find the volume of the pyramid with a rectangular base shown below
h=11in
w=12in
l=10in

120 cubic inches
440 cubic inches
528 cubic inches
336 2/3 cubic inches
1320 cubic inches

11*12*10=1320 in

Click here to see answer by stanbon(57332)

Question 387399: The homework question is,Show that the line with equation y=2x-10 is a tangent to the circle with equation x2+y2-4x+2y=0 and establish the coordinates of the point of contact. x2 means x squared and y2 means y squared. Can you provide a solution with working please?
Many Thanks,
Andrew.

Click here to see answer by scott8148(6628)

Question 387553: An ant start at the point (1,0) on the unit circle and walks counterclockwise 3 unit around the circle. Find coordinates of y and find the location of the ant.
Click here to see answer by Alan3354(30993)

Question 388025: Find the center of a circle defined by the equation: x^2+y^2-10x+12y+12=0.
Click here to see answer by ewatrrr(10682)

Question 388029: Find the radius of the circle defined by the equation: x^2+y^2-10x+4y+4=0.
Click here to see answer by ewatrrr(10682)

Question 388029: Find the radius of the circle defined by the equation: x^2+y^2-10x+4y+4=0.
Click here to see answer by MathLover1(6628)

Question 388032: Find the center of a circle using this equation x^2+y^2-10x-10y+34=0.
Click here to see answer by Fombitz(13828)

Question 388034: Find the center of the circle using these three points: (-14,-1),(-8,5),(-2,-1).
Click here to see answer by Fombitz(13828)

Question 388036: find the radius of the circle by using this equation: 3x^2+3y^2+42x+42y+186=0.
Click here to see answer by Fombitz(13828)

Question 388037: Find the center of the circle using this equation: 4x^2+4y^2-24x-48y-16+0.
Click here to see answer by ewatrrr(10682)

Question 388041: Find the radius of the circle using these three points: (-2,2),(-8,-4),(4,-4)with a center of(-2,-4)
Click here to see answer by solver91311(16877)

Question 388041: Find the radius of the circle using these three points: (-2,2),(-8,-4),(4,-4)with a center of(-2,-4)
Click here to see answer by ewatrrr(10682)

Question 388043: Find the center of a circle using these three points: (3,4),(9,10),(15,4).
Click here to see answer by ewatrrr(10682)

Question 388042: Find the radius of the circle using these three points: (-2,2),(-8,-4),(4,-4)and center (-2,-4)
Click here to see answer by ewatrrr(10682)

Question 388048: Find the radius of a circle defined by the equation: x^2+y^2+12x+6y+29=0.
Click here to see answer by solver91311(16877)

Question 388056: Find the radius of the circle using these three points: (-9,-5),(-6,-2),(-3,-5) and center (-6,-5).
Click here to see answer by solver91311(16877)

Question 388133: Use the rational zero theorem to find all possible rational zeros for the polynomial function. m(x)= x^3+4x^2+4x+3
Click here to see answer by robertb(4012)

Question 388355: Line NO is tangent to the circle at N and the measure of arc LM is 56°.
What is the measure of MNO?
Click here to see answer by Fombitz(13828)

Question 388452: Three circles of radii 2, 4, and 6 are tangent to each other externally. Find
the area of the triangle formed by connecting their centers.
Click here to see answer by Fombitz(13828)

Question 388757: Calculate the ratio between the radii of two spheres, when one is drawn around the cube and the other inside the cube
Click here to see answer by Jk22(389)

Question 388780: an isosceles triangle, whose legs are each 13, is inscribed in a circle. if the altitude to the base of the triangle is 5, find the radius of the circle.
Click here to see answer by scott8148(6628)

Question 388781: a hemispherical pot is used for hanging basket. the width of the surface of the soil is 30 cm. The maximum depth of the soil is 10 cm . find the radius of the pot
Click here to see answer by scott8148(6628)

Question 388878: Please help me answer this question

The Louisiana Superdome covers an area of 363,000 square feet. Find the diameter of this round arena
to the nearest foot. Use pi = 3.14.

Click here to see answer by jim_thompson5910(28593)

Question 388875: Please help me answer this question

A thin metal rod 8 ft long is to be bent into a circular hoop. Find the radius of this hoop to the nearest tenth of an inch.

Click here to see answer by haileytucki(390)

Question 388933: A right triangle is inscribed a circle with a diameter of 10. The height of the triangle is 8 and its hypotenuse has a length of 10. If you choose a point in the given circle, find the probability it will land in the shaded region (aka, the right triangle). (answer in % form and rounded to the nearest tenth)
Click here to see answer by ewatrrr(10682)

Question 388985: The area of the cirlcle with a center O is 36pie. What is the length of diagonal of AC in rectangle ABCO shown above?
Click here to see answer by Alan3354(30993)

Question 388149: Draw a circle with a diameter of 7 cm and a point,P, 10cm from the centre of this circle. Complete the diagram by adding the two tangents to the circle from the point P. Label the points of the tangency A and B) Provide sufficient additional information to determine the lengths of PA and PB.
Click here to see answer by Edwin McCravy(8908)

Question 389980: find the radius of the circle passing through point (-2,10) and having a center at(4, -2). write an equation for the circle.
Click here to see answer by ewatrrr(10682)

Question 389910: In circle P (P is center) , if BP=60 degrees, what is the length of BC? Round to the nearest tenth. Note: On my homework, it shows a picture of the circle. I can not show it to you, but here is the describtion: Line AC is a diameter, it is diagonal, C is at the upper right and A is at the lower left. From P, BP is a radius, it is vertical and on top of P. On the contrary, DP is another radius shown, and is horrizontal to the right of P. I hope this helps! Sorry for the poor description.
Click here to see answer by ankor@dixie-net.com(15649)

Question 390384: A right triangle (the shaded region) is inscribed in a circle; its hypotenuse is also the diameter of the circle. It has a length of ten. The long leg of the triangle has a length of 8. If you choose a point in the given circle, find the probability it will land in the shaded region.
Click here to see answer by edjones(7569)

Question 390500: a globe as radius of 150cm.Find the distance of a point 48 degree north latitude from the equator?

Click here to see answer by Alan3354(30993)

Question 390929: The angle formed by two secants intersecting in the exterior of the circle measure 86.One of the intercepted arcs is 230,find the other arc.
Click here to see answer by vksarvepalli(154)

Question 391141: The diameter of circle C is 18 units long. Find the length of an arc that has a measure of 100 to the nearest tenth
Click here to see answer by ankor@dixie-net.com(15649)

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