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

Tutors Answer Your Questions about Circles (FREE)

Question 79578: Three circles with radii 6 are tangent to each other. Find the area of the region enclosed between them. Please provide a diagram.
Click here to see answer by scott8148(6628)

Question 79839: Solve the proportion :
12 / 44 = 21 / x
Click here to see answer by checkley75(3666)

Question 79854: Here is my word problem, need to write an equation:
A lanscape architect wants to position a tree 3 meters east and 9 meters north of a stong marker in a garden. When the tree is full grown, its branches will be roughly circular with a diameter of about 4 meters. Write an equation representing the outside of the grown tree's branches relative to the stone.
I understand how to do equations with center points and endplate points, but I just don't see how to do this. Thanks
Click here to see answer by scott8148(6628)

Question 80160: The wheel of a certain car is 61.0 cm in diameter. Assuming that there was no slipping, how many turns did the wheel make in covering a distance of 2.3 km.?
I am really stumped and would appreciate any help you could provide.
Thank You,
makennedy01
Click here to see answer by ankor@dixie-net.com(15656)

Question 80161: With 300 turns, the tire of a car advanced 584 m. Assuming that there was no slipping, what is the diameter of that wheel to the nearest hundreth of a meter?
I would really appreciate any help anyone might be able to give me.
Thank You,
makennedy01
Click here to see answer by ankor@dixie-net.com(15656)

Question 80354: Can anyone help me with this problem?
Find the capacity, in gallons, of a cylindrical tank having a diameter of 8.00 ft. 8.00 in. and an altitude of 12.0 ft.
Thank You,
makennedy01
Click here to see answer by stanbon(57361)

Question 80411: I have two questions. I am not sure if one goes here or not. I worked them but not sure if I did it right. Can someone please help?
The diagonal of a square measures 4 inches. What is the length of the sides?
If the circumference of a circle is 5.68 X 109 feet, then what is its radius?
thanks so much!!
Click here to see answer by josmiceli(9686)

Question 80986: if the radius of circle A is twice the length of the radius of Circle B, does that mean that circle A has twice the area of circle B? Explain whiy or why not.
Click here to see answer by stanbon(57361)

Question 81587: I have a problem trying to figure this out backward, can you explain this
to me clearly step by step. Since my textbook did not explain how to do it
backward. I already know how to do it from the beginning to the end. I am
unable to do it backward from the end to the beginning. Explain step by
step which I would greatly appericated. These formula is what I need:
radius Diameter circumference area
? ? ? 243cm squared
radius Diameter circumference area
? ? 54cm ?

radius Diameter circumference area
? 9 ? ?

Click here to see answer by vertciel(183)

Question 79840: Solve the proportion :
40/27 = 3x + 1 / 2x + 1
Click here to see answer by vertciel(183)

Question 70180: Um... How many bases does a square pyramid have?

THANK YOU
Click here to see answer by vertciel(183)

Question 81620: If the measure of central angle BAC= 70, then the measure of arc BC= ?
Click here to see answer by stanbon(57361)

Question 82015: Hi there,
This problem was on my homework assignment last night, and my teacher marked it wrong. I don't know what I did wrong. This was the work I did.
5^2 + 12^2 = x^2
25 + 144 = x^2
169=x^2
x=13

Thanks!
Click here to see answer by Edwin McCravy(8909)

Question 82020: Hello there,
This problem is on my math homework tonight, and I'm so confused. I tried to work on it, but I'm not sure if I'm doing it right.
This is what I tried:
y+3=x+4
y=x+1
2.5+x=4+6
2.5+x=10
x=7.5
y+3=7.5+4
y=7.5+1
y=8.5

Thanks!
Click here to see answer by Edwin McCravy(8909)

Question 82016: Hello,
This problem is on my homework tonight and I'm not sure how to do it. Do you think you could help? I tried doing
4/x = 8/6
8x=24
x=3
but I don't think that's the right answer.
If you could help that'd be great. Thanks!

Click here to see answer by shrty1351(6)

Question 82017: Hello, I have this problem on my homework tonight and I'm not sure I have the right answer. Could you explain how to do this?
I tried 5x+5=4x-13
5x+18=4x
x=18
7y=y+50
6y=50
y=8 1/3
But I can tell that's not right when I go to double-check it.
Thanks for your help!

Click here to see answer by shrty1351(6)

Question 82527: Two parallel chords 16 cm and 30 cm long are 23cm apart. What is the radius of the circle?
Click here to see answer by scott8148(6628)

Question 82851: A circle is defined by the following equation:
2x^2+2y^2+28x+80=0
What is the radius?
Click here to see answer by funmath(2925)

Question 82853: A circle is defined by the following equation :
3x^2+3y^2-24x+42y+183=0
What is the radius?
Click here to see answer by funmath(2925)

Question 82987: Find the slope of the line tangent to a circle with center o at (5,3) at point B (-2,5).
I got: -7/2
Is this right?
Thanks
Click here to see answer by Edwin McCravy(8909)

Question 83019: how do i find the area of a cirlce on a pie-graph
Click here to see answer by rapaljer(4667)

Question 82018: Hi there,
This problem is on my Geometry homework for tonight, and I don't know how to find x. If you could help me I'd really appreciate it. Thanks!

Click here to see answer by Nate(3500)

Question 82019: Hi, this problem is on my homework assignment, and I have no idea how to start this. I'm very confused and I was hoping you guys could help.
Thanks!

Click here to see answer by Nate(3500)

Question 84318: I am confused as to how to find the radius and center of a circle by using an equation. Here's the equation:

x^-4x+y^+2y=-1
Click here to see answer by rapaljer(4667)

Question 84393: what is the circunference in area of a pool in 30' diameter
Click here to see answer by tutor_paul(490)

Question 84396: what formula you use to find the circunference in area in a pool of 30' diameter and how did you get ( 84393 )
Click here to see answer by checkley75(3666)

Question 84413: Ao = 17 and ob=8 find ba
Click here to see answer by sofiyacherni(99)

Question 84635: Find the equation of a circle with center:(5,-2) and radius:16
Click here to see answer by rapaljer(4667)

Question 82022: Hi there,
This problem is on my Geometry homework tonight, and I'm really confused. Can you help me?

Thanks!
Click here to see answer by ASHISHCRAB(1)

Question 85538: What is the circumference of the circle when 38in is the radius?
Click here to see answer by tejasri.dittakavi(1)

Question 85544: I know this is an easy question but I kept getting it wrong. Could you please help? If the circumference of a circle is dtt, then the circumference of a a semi-circle is ? Would it be .5(dtt) I am not sure
Click here to see answer by jim_thompson5910(28595)

Question 85588: A company has a right cylindrical storage tank for storing natural
gas. The tank measures 20 feet wide by 60 feet high.
The company estimates that it will cost $2.00 per square foot to
paint the tank. Which of the following expressions could be used
to determine the total cost to paint the top and the side of the tank?
A.
B.

C.
D.

Click here to see answer by jim_thompson5910(28595)

Question 85770: A diameter that is perpendicular to a chord___the chord and its arc
Tangents to a circle from a point are (a)___ and (b) each tangent is ___ to the radius drawn to the point of tangency
Click here to see answer by Edwin McCravy(8909)

Question 86245: Hello, would you please help me with this:
1- find center and radius of a circle that has the equation (x-3)^2+(y+5)^2=36
Click here to see answer by stanbon(57361)

Question 86708: May i get some help on this problem
Two circles have areas of 49*pi and 36 *pi. find the ratio of their radii
Click here to see answer by stanbon(57361)

Question 86709: 1)Write an equation of the circle with center (1,-1) if (-1/2,-1) lies on the circle
I know this is not suppose to be in this catagory but i really need help with this problem.
2) The slope of any line perpendicular to the line y=-1/3x-4
Click here to see answer by stanbon(57361)

Question 87055: What are the different formulas for tangents?
Click here to see answer by Edwin McCravy(8909)

Question 87749: Determine the radius of the circle, given its centre and a point on its circumfrence. Round the radius to the nearest tenth, if necessary.
center (1,1) point (-2,1)
Click here to see answer by rapaljer(4667)

Question 91319: hi, i would like to how can i solve the following problem: ''the circumference of a semi-circle is 1000m. find its area.''
so please can you help me with this problem.
thanks!
Click here to see answer by checkley71(8403)

Question 91378: If the diameter of a circle is 6 units ling, what is the area of the circle, in square units?
Click here to see answer by stanbon(57361)

Question 91337: The point (2,0) is on a circle with the center(-1,4). Find the length of the radius.
Click here to see answer by jim_thompson5910(28595)

Question 91484: Find the rectangular coordinate of the point P on the unit circle that corresponds to
t = - pi/2
a. (-1,0)
b. (0.-1)
c. (0,1)
d. (1,0)
Click here to see answer by stanbon(57361)

Question 91634: Help.
The point (2,0) is on a circle with the center (-1,4). Find the length of the radius.
Click here to see answer by jim_thompson5910(28595)

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