A geometry equation solver that runs on Numworks calculators (Rust) with a reference implementation in Python.
- Equation solving using a built-in CAS (symbolic manipulation, solving for any variable)
- Multi-line text editor for entering equations on the calculator
- Interactive variable selection (choose which variable to solve for and enter values for unknowns)
- Methods-driven geometry system (geometry shapes and their properties/relations defined in JSON method files)
- Python reference implementation (TUI app for testing the methods system and input parsing)
cd python
uv sync
uv run python main.pypyA 3-tab TUI: Given (enter geometry facts like circle:radius=5), Find (what to solve for), Run (parse input and view results).
Requires Rust, ARM embedded toolchain, the Epsilon simulator, and other dependencies. On Debian-based Linux:
cd rust
bash setup.sh
just sim # build and run in the Epsilon simulator| Action | Key |
|---|---|
| Type equation | Calculator keys (Alpha for letters, Shift for symbols) |
| Move cursor | Left / Right / Up / Down |
| Backspace | Backspace |
| New line | Ans |
| Solve | Back or Exe |
| Select variable | Up / Down + Ok |
| Enter numeric value | Calculator keys + Ok |
| Dismiss result | Ok / Back / Exe |
The app boots into the equation editor. Type an equation (e.g. A = pi * r^2), press Exe, choose a variable to solve for, enter values for remaining unknowns, and view the result.
See rust/justfile: just build-epsilon, just build-upsilon, just send-epsilon, just send-upsilon, just check.
- Solving some equations may not yield all possible results.
I don't think I really used AI to help develop this.
