High school (grades 9–10) · TypeLab 2D
Unequal Angle Section
Unequal Angle Section: a composite plane figure made of a rectangle 5.4 × 7.8 cm, minus a rectangle 7.6 × 12.4 cm. It is a classic high school (grades 9–10) geometry problem (“Structural Sections”). The net area is 18.56 cm² and the total perimeter is 26.4 cm.
Certified measurements (1:1 scale)
- Net area
- 18.56 cm²
- Total perimeter
- 26.4 cm
- Bounding box
- 5.4 × 7.8 cm
- Basic shapes
- 2
Step-by-step decomposition
- 1.Baserectangle 5.4 × 7.8 cm42.12 cm²
- 2.−rectangle 7.6 × 12.4 cm94.24 cm²
Area of each basic shape before the Boolean composition.
How to find the area
Area formula: A = (B + H − s)·s
The parts overlap or intersect, so the net area (18.56 cm²) comes from the exact Boolean operation rather than from a plain sum of the part areas.
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.
