Formula Display

• Parallelogram: Base × Height
• Triangle: (Base × Height) ÷ 2
• Trapezoid: (Top Base + Bottom Base) × Height ÷ 2
• Conversion rule: 1 m = 100 cm (1 m² = 10,000 cm²)

Live Calculations

Select any shape to view live dimensions, height lines, units, and area calculations.

Interactive Units Guide

  • Default Unit: All dimensions start initially as cm.
  • Toggle Units: Tap directly on any badge on the shape (e.g. [cm]) or the switch button in the sidebar to toggle between cm and m.
  • Unit Conversion Trap: If base and height have different units (e.g. Base in m, Height in cm), the sidebar automatically conducts step-by-step conversion before calculating area!