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Trapezoid Calculator

Trapezoid Calculator

Calculate trapezoid area and perimeter with special support for isosceles trapezoids. Remember: don't forget to divide by 2 in the area formula!

Trapezoid Calculator

Calculate area, perimeter, and special trapezoid properties

Real-World Applications

Stadium Seating

Trapezoidal sections provide optimal viewing angles

Upper: 20m, Lower: 30m, Height: 15m → Area: 375m²

Dam Cross-Section

Wider base provides stability against water pressure

Top: 5m, Bottom: 15m, Height: 20m → Area: 200m²

Bucket Shape

Tapered design for easy manufacturing and stacking

Top: 25cm, Bottom: 20cm, Height: 30cm → Area: 675cm²

Trapezoid Types & Common Mistakes

📐 Trapezoid Types:

  • General: One pair of parallel sides
  • Isosceles: Equal legs, symmetric
  • Right: One or more right angles
  • Scalene: All sides different lengths

❌ Common Mistakes:

  • • Forgetting to divide by 2 in area formula
  • • Using wrong bases (not parallel sides)
  • • Confusing leg length with height
  • • Not checking if trapezoid is isosceles