Key features:

Display mathematical formulas for each shape

Support for 15 geometric shapes (11 2D shapes + 4 3D volumes)

Ability to add multiple shapes dynamically and perform aggregate calculations

Validate inputs and display relevant errors

Instant calculations of perimeter, area and volume with 2 decimal places

1. Students:

o Solve geometry exercises 📐 (intermediate to university)

o Check answers to perimeter, area and volume problems

o Visual understanding of complex formulas (such as ellipse area or cone volume)

2. Engineers and designers:

o Quick calculations in construction projects 🏗️ (concrete formwork, meter and estimate)

o Interior decoration design 🛋️ (calculate carpet, wallpaper, lighting area)

o Mechanical engineering ⚙️ (calculate cross-sectional area, tank volume)

3. Architects and urban planners:

o Building plan design 🏢 (calculate space area, golden ratio)

o Estimate Materials (ceramics, paint, plaster)

o Lighting calculations 💡 (based on surface area)

4. Farmers and gardeners:

o Calculating the area of agricultural land 🌾

o Estimating the volume of water required for irrigation 🚿

o Designing a drip irrigation system 💧

5. Craftsmen and manufacturers:

o Cutting sheet metal

o 3D manufacturing (calculating the volume of raw materials)

o Building space structures 🛰️ (calculating cross-sectional area)

6. Variety of shapes: covering 95% of everyday computing needs

7. Mixed calculations: Ability to work with 2D and 3D shapes simultaneously

8. Interactive learning: Simultaneous display of formula and result 📚

9. Smart debugging: Warning for invalid values (such as negative dimensions)

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✅ Summary: This tool is not just a calculator, but also an intelligent engineering assistant that can be used from the classroom to professional projects!