7th Grade · Geometry
Scale Drawing
7.G.A.1
Definition
A proportional drawing of an object, where all dimensions are reduced or enlarged by the same scale factor. Used in architecture, maps, and engineering.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- Drawing 6cm × 4cm at scale 1cm = 2m gives actual room 12m × 8m.
- Actual size = drawing size × scale factor, or drawing size = actual size ÷ scale factor.
Key rule
Every dimension in the drawing scales by the same factor.
Memory hook
A shrunk or stretched copy, every part scaled the same.