TYPEMATH
C023 · Composite PolygonsISO 128 · 1:1
Bicone Double Trapezoid — composite figure at 1:1 scale with dimensions, area 33.04 cm²
A = (B + b)·h

Middle school · TypeLab 2D

Bicone Double Trapezoid

Bicone Double Trapezoid: a composite plane figure made of a trapezoid with bases 7.6 and 4.2 cm and height 2.8 cm, joined with a trapezoid with bases 7.6 and 4.2 cm and height 2.8 cm. It is a classic middle school geometry problem (“Composite Polygons”). The net area is 33.04 cm² and the total perimeter is 21.5 cm.

Certified measurements (1:1 scale)

Net area
33.04 cm²
Total perimeter
21.5 cm
Bounding box
7.6 × 5.6 cm
Basic shapes
2
Open in TypeLab 2D

Step-by-step decomposition

  1. 1.Basetrapezoid with bases 7.6 and 4.2 cm and height 2.8 cm16.52 cm²
  2. 2.+trapezoid with bases 7.6 and 4.2 cm and height 2.8 cm16.52 cm²

Area of each basic shape before the Boolean composition.

How to find the area

Area formula: A = (B + b)·h

Split the figure into basic shapes, find each area, add the joined parts and subtract the cut-outs: A = 16.52 + 16.52 = 33.04 cm².

Editable in PowerPoint & Office

The .PPTX file contains native DrawingML shapes: outlines, dimensions and labels stay separate objects you can recolor and edit in PowerPoint, Keynote and Google Slides. The .SVG file is pure vector art at 1:1 scale on an A4 sheet, ready for print, LaTeX and textbook layout.

Composite figures →