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Tutors Answer Your Questions about Circles (FREE)
Question 23097: How do I answer this question: Quadrilateral ABCD is inscribed in circle O ,(a line on top of BD& AG ,PAB PDC)BD and AG are diameters , PAB and PDC are secants mAD = 80 degrees and mDC = 40 degrees (AD and DC have a arc avobe it)
thank you ,
Nella
Click here to see answer by venugopalramana(3286)   |
Question 24648: 1.) which of the following points are inside the graph of the circle (x-3)^2 + (y-2)^2 = 4?..
a. (3, 2) b. (3, 5) c. (1, 4) d. (3, 4)
2.) find the points of intersection of x^2 + y^2 + x - 3y=0 and 2x^2 + 2y^2 - 2x + y - 10=0..
Click here to see answer by stanbon(26297)  |
Question 25528: I don't know if I am in the right section
Please help = my question is:
The circumference of a circle is 132 yards. Find the radius using the pie of 22/7
The formula is 132=2 x 22/7x - they want me to do it in 4 steps - the last one is were I put in the x number and it never works. Help
Click here to see answer by elima(1433) |
Question 25757: Three circles, two of them equal, are drawn in contact with a semicircle (two out of the three circles drawn in the semicircle are the same size and are the smallest).
The radius of the semicircle is 12 cm.
What is the radius of the smallest circle?
Click here to see answer by venugopalramana(3286) |
Question 25757: Three circles, two of them equal, are drawn in contact with a semicircle (two out of the three circles drawn in the semicircle are the same size and are the smallest).
The radius of the semicircle is 12 cm.
What is the radius of the smallest circle?
Click here to see answer by keigan(2) |
Question 28302: I have an equation for a circle (x+3)^2+(y-1)^2=25 where the centre point is 3,1 and th radius is 5. I need to show that the line of equation y=-x-1 intercepts the circle. I have substituted the value of y into the circle
(x+3)^2+(-x-1-1)^2=25
(x+3)^2+(-x-2)^2=25
But how do i get from here to 2x^2+10x-12=0 an then show that the line intercepts?
Click here to see answer by longjonsilver(2297)  |
Question 30573: 1. if a circle is inside a trapazoid(touching its sides) with one base 45 and the other base 125. what is the diameter of the circle?
2. you have 2 circles touching each other at one point. one circle is 6ft. the other is 18ft. whats the shortest length of cord that will go around both circles?
Click here to see answer by venugopalramana(3286) |
Question 31160: A 6-foot-diameter disk and an 18-foot-diameter disk sit side by side. Determine the shortest length of rope that will go around both disks.
my answer below is different from a friends with a program to figure it out. i am concerned that i am not doing it right.
For circles that are externally tangent the line of centers=the length of the sum of both radii= common external tangents
Line of centers 3+9=12
Common external tangents=12*2=24
60 degrees because we will create a equilateral triangle
Arc 1
Degrees (pi/180) r
60(3.14/180) 3
3.14
Arc 2
60(3.14/180) 9
9.42
Common external tangents+Arc 1+Arc2
24+3.14+9.42
36.56
Click here to see answer by venugopalramana(3286) |
Question 25526: I don't know if I am in the right section
Please help = my question is:
The circumference of a circle is 132 yards. Find the radius using the pie of 22/7
The formula is 132=2 x 22/7x - they want me to do it in 4 steps - the last one is were I put in the x number and it never works. Help
Click here to see answer by stanbon(26297) |
Question 33691: A regular Pentagon ABCDE is incribed in circle O. Chords EC and DB intersect at F (not diameter). Chord DB is Extended to G (outside circle), and Tangent GA is drawn.
find measure of angle BDE
find measure of angle BFC
find measure of angle AGD
Click here to see answer by venugopalramana(3286) |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720
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