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Re: Math Prodigy's [Re: Flippin-Out] #13519516 04/15/20 07:51 PM
Joined: Oct 2006 Posts: 104,503 White Settlement, TX. Bigbob_FTW OP Big Sprocket Bob
OP Bigbob_FTW Big Sprocket Bob Joined: Oct 2006 Posts: 104,503 White Settlement, TX.	Originally Posted by Flippin-Out Ahhh, you need the center of a circle that includes an arc, NOT the centerpoint along the length of an arc. Those are two different solutions. I'll sharpen my crayon with the illustration in front of me. that's it!

Re: Math Prodigy's [Re: Bigbob_FTW] #13519517 04/15/20 07:52 PM
Joined: Sep 2008 Posts: 121,182 lost in the ozone hopalong Pescador Loco
hopalong Pescador Loco Joined: Sep 2008 Posts: 121,182 lost in the ozone	what would lefty do? " Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot! lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479

Re: Math Prodigy's [Re: Bigbob_FTW] #13519530 04/15/20 08:00 PM
Joined: Feb 2015 Posts: 4,740 Magnolia, TX F Flippin-Out TFF Team Angler
Flippin-Out TFF Team Angler F Joined: Feb 2015 Posts: 4,740 Magnolia, TX	BTW, what you have marked as "radius" is the arc. The radius is the dotted line from each end of the chord to the center.

Re: Math Prodigy's [Re: Flippin-Out] #13519543 04/15/20 08:11 PM
Joined: Oct 2006 Posts: 104,503 White Settlement, TX. Bigbob_FTW OP Big Sprocket Bob
OP Bigbob_FTW Big Sprocket Bob Joined: Oct 2006 Posts: 104,503 White Settlement, TX.	Originally Posted by Flippin-Out BTW, what you have marked as "radius" is the arc. The radius is the dotted line from each end of the chord to the center. yes, terminology issue with drafters.

Re: Math Prodigy's [Re: Bigbob_FTW] #13519549 04/15/20 08:17 PM
Joined: Feb 2015 Posts: 4,740 Magnolia, TX F Flippin-Out TFF Team Angler
Flippin-Out TFF Team Angler F Joined: Feb 2015 Posts: 4,740 Magnolia, TX	Originally Posted by Bigbob_FTW Originally Posted by Flippin-Out Looking at either illustration, do you know the x/y coordinates of each of the 3 points connected by the dashed lines? And the goal is to calculate x/y coordinates of the floating point? Two known points are insufficient to arrive at a single unique solution. The reason is that we could fit those two known points very close together as a very small portion of a large circle, or far apart on a smaller circle. In both cases, the circle passes through the two points, but the centers of those two circles are entirely different points on the grid. We need more information to calculate a solution. Since you wish to solve for a radius (and therefore a center) a third point would be needed as one way to allow for a unique solution.

Re: Math Prodigy's [Re: Flippin-Out] #13519567 04/15/20 08:41 PM
Joined: Sep 2008 Posts: 121,182 lost in the ozone hopalong Pescador Loco
hopalong Pescador Loco Joined: Sep 2008 Posts: 121,182 lost in the ozone	Originally Posted by Flippin-Out Originally Posted by Bigbob_FTW Originally Posted by Flippin-Out Looking at either illustration, do you know the x/y coordinates of each of the 3 points connected by the dashed lines? And the goal is to calculate x/y coordinates of the floating point? Two known points are insufficient to arrive at a single unique solution. The reason is that we could fit those two known points very close together as a very small portion of a large circle, or far apart on a smaller circle. In both cases, the circle passes through the two points, but the centers of those two circles are entirely different points on the grid. We need more information to calculate a solution. Since you wish to solve for a radius (and therefore a center) a third point would be needed as one way to allow for a unique solution. can't you find the length of the straight line from x2 - y2 and just center off that? that is how I would lay out your driveway or sidewalk, well, if I was gonna lay out a driveway or a sidewalk for ya. 6/8/10 a 90 from center line of the straight line and poof, you got a driveway! " Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot! lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479

Re: Math Prodigy's [Re: Bigbob_FTW] #13519569 04/15/20 08:42 PM
Joined: Sep 2008 Posts: 121,182 lost in the ozone hopalong Pescador Loco
hopalong Pescador Loco Joined: Sep 2008 Posts: 121,182 lost in the ozone	dang engineers! " Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot! lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479

Re: Math Prodigy's [Re: TexDawg] #13519585 04/15/20 08:57 PM
Joined: Oct 2005 Posts: 86,137 Trent Woods, NC John175☮ MACHO MAN
John175☮ MACHO MAN Joined: Oct 2005 Posts: 86,137 Trent Woods, NC	Originally Posted by TexDawg 7 42 Stress less, relax more. Go fishing.

Re: Math Prodigy's [Re: Bigbob_FTW] #13519596 04/15/20 09:08 PM
Joined: Jul 2012 Posts: 22,230 Grapevine, TX D Davedave Bigfoot Seeker
Davedave Bigfoot Seeker D Joined: Jul 2012 Posts: 22,230 Grapevine, TX	https://www.mathopenref.com/arcradius.html Get the height, and you’re golden. Otherwise, I think you’re SOL, just like supergay Clay Jenkins at the next election.

Re: Math Prodigy's [Re: Bigbob_FTW] #13519628 04/15/20 09:35 PM
Joined: Oct 2006 Posts: 104,503 White Settlement, TX. Bigbob_FTW OP Big Sprocket Bob
OP Bigbob_FTW Big Sprocket Bob Joined: Oct 2006 Posts: 104,503 White Settlement, TX.	I think the answer is here of I can figure it out. https://math.stackexchange.com/ques...art-point-end-point-radius-and-arc-direc

Re: Math Prodigy's [Re: hopalong] #13519632 04/15/20 09:37 PM
Joined: Mar 2015 Posts: 13,113 dazed and confused U UGLYSHCTICK TFF Guru
UGLYSHCTICK TFF Guru U Joined: Mar 2015 Posts: 13,113 dazed and confused	Originally Posted by hopalong dang engineers! Just want to make folks smile, and spit coffee on their keyboard. If you put beans in your chili, you don't know beans about chili. God doesn't create temporary people, you will spend eternity somewhere. Choose wisely.

Re: Math Prodigy's [Re: UGLYSHCTICK] #13519639 04/15/20 09:40 PM
Joined: Oct 2006 Posts: 104,503 White Settlement, TX. Bigbob_FTW OP Big Sprocket Bob
OP Bigbob_FTW Big Sprocket Bob Joined: Oct 2006 Posts: 104,503 White Settlement, TX.	Originally Posted by UGLYSHCTICK Originally Posted by hopalong dang engineers! Used to have of on my wall!

Re: Math Prodigy's [Re: Bigbob_FTW] #13519652 04/15/20 09:54 PM
Joined: Apr 2006 Posts: 26,597 Highland Village O outfishdya TFF Guru
outfishdya TFF Guru O Joined: Apr 2006 Posts: 26,597 Highland Village	You cannot just draw features on a navionics map and expect to catch fish there. Sometimes a bitter man trying to be a better man

Re: Math Prodigy's [Re: hopalong] #13519666 04/15/20 10:12 PM
Joined: Feb 2015 Posts: 4,740 Magnolia, TX F Flippin-Out TFF Team Angler
Flippin-Out TFF Team Angler F Joined: Feb 2015 Posts: 4,740 Magnolia, TX	Originally Posted by hopalong Originally Posted by Flippin-Out Originally Posted by Bigbob_FTW Originally Posted by Flippin-Out Looking at either illustration, do you know the x/y coordinates of each of the 3 points connected by the dashed lines? And the goal is to calculate x/y coordinates of the floating point? Two known points are insufficient to arrive at a single unique solution. The reason is that we could fit those two known points very close together as a very small portion of a large circle, or far apart on a smaller circle. In both cases, the circle passes through the two points, but the centers of those two circles are entirely different points on the grid. We need more information to calculate a solution. Since you wish to solve for a radius (and therefore a center) a third point would be needed as one way to allow for a unique solution. can't you find the length of the straight line from x2 - y2 and just center off that? that is how I would lay out your driveway or sidewalk, well, if I was gonna lay out a driveway or a sidewalk for ya. 6/8/10 a 90 from center line of the straight line and poof, you got a driveway! Yes, the midpoint of the chord can be located. (The chord is the straight line between two points on a circle. Then we could mark a radius, but we don't know how FAR it is to the center of the circle. When you layout some concrete forms, you are also "mentally" doing some curve fitting. You choose a radius that smooths the lines together, and that's by sight for aesthetics. He's working with a grid in a program, so that human choice can't be injected.

Re: Math Prodigy's [Re: outfishdya] #13519667 04/15/20 10:12 PM
Joined: Sep 2008 Posts: 121,182 lost in the ozone hopalong Pescador Loco
hopalong Pescador Loco Joined: Sep 2008 Posts: 121,182 lost in the ozone	Originally Posted by outfishdya You cannot just draw features on a navionics map and expect to catch fish there. I don't have to draw on my navionics map to not catch fish, look at all the time I saved. " Hop, set the hook"! hopalong 99,999 TexDawg 99,999 FJB! not my president by a long shot! lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479

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