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diameter for this please

Wondering if the Cadaco game discs are the same size? Thanks
image
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Comments

  • WinPitcherWinPitcher Posts: 27,726 ✭✭✭
    Jack

    Get a string and go around the circumference and then divide by 3.14 that will give you the diameter.


    At least I think that's how you do it.


    been a long time since I had to do that.


    Steve
    Good for you.
  • jeffcbayjeffcbay Posts: 8,951 ✭✭✭✭
    I think the easiest way is to measure across the center. I have a set of those, and I measure 3-3/8".
  • bobsbbcardsbobsbbcards Posts: 3,254 ✭✭✭


    << <i>I think the easiest way is to measure across the center. I have a set of those, and I measure 3-3/8". >>


    image
  • jackstrawjackstraw Posts: 3,820 ✭✭✭✭
    Thanks I meant what Jeff said. Wasn't sure if that is called diameter or circumference?
    Collector Focus

    ON ITS WAY TO NEWPORT BEACH, CA 92658
  • billwaltonsbeardbillwaltonsbeard Posts: 3,748 ✭✭✭✭
    E = MC2?
  • WinPitcherWinPitcher Posts: 27,726 ✭✭✭
    circumference is the length of the string I was talking about, the outer perimeter of the circle.

    Jeff's way is the easiest way, just make sure you measure through the center.

    For some reason last night I was thinking measuring through the center would give the radius.


    Like I said it has been a long time since I failed 10th grade geometry.





    image


    Steve
    Good for you.
  • jeffcbayjeffcbay Posts: 8,951 ✭✭✭✭
    I'm a draftsman, so that helps! image
  • jackstrawjackstraw Posts: 3,820 ✭✭✭✭
    Now that radius has entered the equation I am totally confusedimage
    diameter is what I am looking for I think
    radius is half the cirumference?
    circumference is the area in size and thats when pie is used?
    Maybe Bob can raise his hand and tell me if the Cadaco and these 70's discs are the same size
    so when I submit them (Cadaco) I won't get the dreaded mylar sleeve.
    Collector Focus

    ON ITS WAY TO NEWPORT BEACH, CA 92658
  • jeffcbayjeffcbay Posts: 8,951 ✭✭✭✭
    The diameter is the width of the circle, from side to side. The radius is half the width (or diameter). The circumference is the distance around the outside edge of the circle. You wanted the diameter, because the other two measurements would be useless to know.


  • << <i>The diameter is the width of the circle, from side to side. The radius is half the width (or diameter). The circumference is the distance around the outside edge of the circle. You wanted the diameter, because the other two measurements would be useless to know. >>



    Can I borrow your brain Jeff?
  • jeffcbayjeffcbay Posts: 8,951 ✭✭✭✭
    My knowledge stops there, trust me. lol
  • AUPTAUPT Posts: 806 ✭✭✭
    Isaly's and the related discs of the 1970s-1980s are 3-3/8" diameter; Cadaco discs of the 1990s are 3-1/2" diameter.
  • jackstrawjackstraw Posts: 3,820 ✭✭✭✭
    Thanks I am so bummed because I think they look real nice without the mylar sleeve.
    Collector Focus

    ON ITS WAY TO NEWPORT BEACH, CA 92658
  • alnavmanalnavman Posts: 4,129 ✭✭✭


    << <i>The diameter is the width of the circle, from side to side. The radius is half the width (or diameter). The circumference is the distance around the outside edge of the circle. You wanted the diameter, because the other two measurements would be useless to know. >>



    ....put the lime in the coconut and .....
  • DboneesqDboneesq Posts: 18,219 ✭✭
    A QUICK GEOMETRY 101 RECAP

    Point ... A location in space - a dot on a piece of paper

    Line ... Connects two points via the shortest path and continues indefintely (forever) in both directions

    Line Segment ... Part of a line between two points

    Perpendicular Line Segment ... Line Segments that intersect (cross) at an angle of 90°

    Parallel Line Segments ... Line segements that never intersect (they are always the same distance apart)

    Right Angle ... An angle that measures 90°

    Acute Angle ...An angle that measures less than 90°

    Obtuse Angle... An angle that measures more than 90°

    Vertex ... Point at which two line segments intersect (forming an angle)

    Scalene Triangle ... A triangle with all three sides with different lengths

    Isosceles Triangle ... A triangle with two equal length sides (and two equal internal angles)

    Equilateral Triangle... A traingle with all three sides of equal length (each internal angles = 60°)

    Radius ... Distance (line segment) from center of a circle to any point on that circle's circumference.

    Diameter ... A line segment (or length) joining two points on a circles circumference and passes through the circle's center (twice the length of the radius)

    Circumference ... Distance around a circle (the perimeter)

    Chord ... A line segment joining two points on a curve.

    Arc ... Part of a curve

    LOL

    STAY HEALTHY!

    Doug

    Liquidating my collection for the 3rd and final time. Time for others to enjoy what I have enjoyed over the last several decades. Money could be put to better use.
  • WinPitcherWinPitcher Posts: 27,726 ✭✭✭
    You missed one:

    The distance around the inside of the circle is called the disc I believe.


    image


    Steve
    Good for you.
  • For a circle Pi is always the ratio of the circumference to the diameter .. i.e---

    C/D=Pi

    Pi is a known (3.1417) so if you know or can measure the radius or circumerence it is a simple plug and chug equation to solve for the unknown.

    Here is the derivation...

    C=2*Pi*Radius
    D=2*Radius

    C/D=2*Pi*Radius/2*Radius

    Cancel out like terms and you are left with

    C/D=Pi
  • jeffcbayjeffcbay Posts: 8,951 ✭✭✭✭
    Another one...

    Parabola: A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the cone or by the locus of points equidistant from a fixed line and a fixed point not on the line.

    It's also a sweet Tool song! image
  • jackstrawjackstraw Posts: 3,820 ✭✭✭✭
    I feel so dumbimage
    Collector Focus

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  • bobsbbcardsbobsbbcards Posts: 3,254 ✭✭✭


    << <i>I feel so dumbimage >>


    Your mother and I should never have sent you to boarding school (forgive us). image
  • swartz1swartz1 Posts: 4,911 ✭✭✭
    How did I miss this thread...Never fear the CAD Teacher is here...


    Looking for 1970 MLB Photostamps
    - uncut


    Positive Transactions - tennesseebanker, Ahmanfan, Donruss, Colebear, CDsNuts, rbdjr1, Downtown1974, yankeeno7, drewsef, mnolan, mrbud60, msassin, RipublicaninMass, AkbarClone, rustywilly, lsutigers1973, julen23 and nam812, plus many others...
  • swartz1swartz1 Posts: 4,911 ✭✭✭
    image


    Looking for 1970 MLB Photostamps
    - uncut


    Positive Transactions - tennesseebanker, Ahmanfan, Donruss, Colebear, CDsNuts, rbdjr1, Downtown1974, yankeeno7, drewsef, mnolan, mrbud60, msassin, RipublicaninMass, AkbarClone, rustywilly, lsutigers1973, julen23 and nam812, plus many others...
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