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## Mathcad Community Challenge May 2022 - An Isoperimetric Geometry Problem

The first two challenges were biased towards mechanical engineering. May’s challenge pertains to geometry. Create a worksheet in which you calculate (1) the diameter of a circle and (2) the length of a side of a square that yields the minimum combined area for a combined perimeter of 1 meter. This is an optimization problem. What tools within Mathcad can provide you with a result? Optional: How can you depict the results? Can you use a 2D plot or Chart Component to visualize the answer? Find the Mathcad Community Challenge Guidelines here!
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## Mathcad Community Challenge July 2022 - Area of a Spherical Triangle

This month's challenge is another geometry-based challenge - but it's non-Euclidean geometry. Given the following three points on a circle of radius 10 units, calculate the area of the spherical triangle: (5.339, 6.948, 4.819) (-4.018, -3.703, 8.375) (6.455, -6.679, -3.705) (Note that the point coordinates are rounded to three decimal places.)   Optional: Can you write a program or function that calculates the area for any three points on the surface? Is there a symbolic evaluation for three generic points (a,b,c), (d,e,f), and (g,h,k)?   Here is a 3D model in Creo 9 of the sphere and points:   Find the Mathcad Community Challenge Guidelines here!   Edit: the coordinates of the second point were incorrect. Wildly incorrect. I have no idea how I wrote down the wrong numbers.
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## WriteSTL Custom Function

Full list of worksheets   WriteSTL allows Mathcad users to create 3D models mathematically using PTC Mathcad then save them as STL files, perfectly suited for incorporation to CAD assemblies.   Along with the README, the WriteSTL.zip file contains two worksheets, showing 2 different matrix styles possible to generate 3D models. WriteSTL takes an array of triangle vertices. The included PTC Mathcad worksheets demonstrate inline routines to convert each matrix type to triangle vertices arrays.   Also included is the WriteSTL Custom Function compiled and linked for the Windows 7 64-bit platform. The MS Visual Studio project with source is included for anyone needing to build for different Windows Platforms. Microsoft has a free, Express version of Microsoft Visual Studio customers are using to successfully build PTC Mathcad Custom Functions.
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## PTC Mathcad Community Challenge Index and Guidelines

PTC Mathcad Community Challenge is a bimonthly event where we pose a math problem for you to collaborate and solve using Mathcad Prime.
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## Announcing PTC Mathcad Prime 4.0 M010

Hi All – I want to announce a critical bug fix release of PTC Mathcad Prime 4.0. We recently discovered an issue where some password protected areas can become corrupted on save/open. This is an issue we feel important enough to fix in a maintenance release. We’ve investigated the issue, submitted and tested a fix and will be releasing PTC Mathcad Prime 4.0 M010 later today. Anyone using Prime 4.0 F000 should upgrade to Prime 4.0 M010 – we’ll be removing Prime 4.0 F000 from download to make sure only the fixed version is available.   We do our best to avoid situations like this but sometimes bugs happen and when they do, we assess them to understand the impact on users. If they’re critical issues, such as this one, we do our best to fix them as soon as possible.   Many thanks,   Andy.
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## Easy Fit

This is the worksheet corresponding to the blog post Curve Fitting Made Easy.
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## Mathcad Community Challenge March 2022 - Planetary Gear Calculator

Let’s face it, planetary gears are cool. They are used in all kinds of mechanisms, including transmissions, motors, and turbines. Your challenge, should you choose to accept it, is to use Mathcad to build a worksheet that calculates the gear ratios and output speeds of a planetary gear under different configurations. The math behind the gear ratios is straightforward. But users should be able to select: The sun or planet carrier as the input; The planet carrier or ring as the output; and, The ring, sun, or planet carrier as the stationary component. How can the user select the desired component? How can you add intelligence to the worksheet to prevent an incorrect combination of input, output, and stationary? What inputs do you want for your calculator? You will have to make some choices. Your choices could include: Number of planets Number of teeth Component diameters Module / pitch Tools that you might consider include Combo boxes, programs, and functions involving strings. Here are some technical references to get you started: KHK Gears Instructables How Stuff Works Once again, this is a great project for students to work on in teams. Make the worksheet as simple or as complicated as you want. Others can build on your work, and you can build on others. Let’s see what the community can create! Good luck!   Find the Mathcad Community Challenge Guidelines here!
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## Painting Easter Eggs with PTC Mathcad

This is the worksheet that corresponds with the blog post Painting Easter Eggs with PTC Mathcad.   Play around with it and paint your own Easter eggs. Be sure to show us what you create!
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## Transferring Mathcad Single User or Student license from an existing Host ID to a new Host ID

Solution: Mathcad Single User and Student Licenses can be transferred by using the link.  Select the version and enter the product code  Enter the new HOST ID onto which the license needs to be transferred - To correctly identify the Host ID on new machine, go to Windows Start > Programs > Accessories > Command Prompt > type ipconfig/all (ENTER) and with the Physical Address below the Ethernet adapter Local Area Connection there stands the Host ID -  Click on #Submit Request Below is the sample email triggered with new HOST ID license file (attachment)    Please save this license file to a secure location on your computer.
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## Customer feedback

As a product manager, customer feedback is essential in developing our product. What we do well is nice to hear but what we don’t do well is what drives our thinking when determining what to put in each release. On a recent Pragmatic Marketing course I was introduced to the saying
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## Mathcad Community Challenge September 2022 - Resistors in Parallel

This month’s challenge is related to electrical engineering. We have a simple circuit with an electrical potential of 220 Volts. Initially we have a single 10 Ohm resistor. Then we add a second resistor in parallel, with 10% higher resistance. Then we add a third resistor in parallel, with 10% higher resistance than the previous resistor. And so on. Calculate the current in the circuit for the single resistor case. Calculate the resistance of each additional resistor and current through each resistor for 2, 3, 4, 5, and 10 resistors in parallel. Can you write a function or program that calculates the resistance of each resistor and current through each resistor for n resistors in parallel? These calculations are fairly straightforward, so it will be interesting to see what tools – vectors, matrices, loops, plots, charts, etc. – that you use to solve the problem. As always, how you document your calculations is important as your worksheet will be visible to the community. Here is an example of three resistors in parallel, as drawn in Creo Schematics:   Find the Mathcad Community Challenge Guidelines here!
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## In Mathcad Prime 2.0, cannot find the command: Hide Keywords, Hide left-hand side

In Mathcad 15.0, we can use the command "Hide Keywords", "Hide left-hand side" and "View Evaluation As > Default, Right shaft, Equal sign" with RMB.But in Mathcad Prime 2.0 we cannot find them again.
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## What's New In PTC Mathcad Prime 9

What's new in PTC Mathcad Prime 9 blog, interview, and webinar. Out now!
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This video gives a quick demo on how to configure Mathcad Prime with floating license server.
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## PTC Mathcad 15.0 M040 is here!

As mentioned by Brent in a previous blog post, we’re committed to maintaining PTC Mathcad 15.0 for the foreseeable future to enable users who can’t yet migrate to the latest version of Mathcad to continue using the product and receiving support for it. We had a few last minute issues
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## Creo Parametric 2.0 integration with Mathcad Prime 3.0

Creo Parametric 2.0 integration with Mathcad Prime 3.0.     (view in My Videos)
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