High school (grades 9–10) · TypeLab 2D
120° Annular Sector
120° Annular Sector: a composite plane figure made of a circular sector of radius 5.4 cm and angle 120°, minus a circle of radius 2.6 cm. It is a classic high school (grades 9–10) geometry problem (“Sectors & Annuli”). The net area is 23.44 cm² and the total perimeter is 22.35 cm.
Certified measurements (1:1 scale)
- Net area
- 23.44 cm²
- Total perimeter
- 22.35 cm
- Bounding box
- 9.35 × 4.1 cm
- Basic shapes
- 2
Step-by-step decomposition
- 1.Basecircular sector of radius 5.4 cm and angle 120°30.54 cm²
- 2.−circle of radius 2.6 cm21.24 cm²
Area of each basic shape before the Boolean composition.
How to find the area
Area formula: A = ⅓·π·(R² − r²)
The parts overlap or intersect, so the net area (23.44 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.
