Scale Drawings Flashcards

Grade 7 · Math · Flashcards

Essential vocabulary for understanding and solving scale drawing problems.

Flashcards

Scale drawing: A proportionally accurate diagram where all measurements are multiplied by the same scale factor
Scale: The ratio showing how drawing measurements relate to real measurements, e.g. 1 cm : 10 m
Scale factor: The number you multiply or divide by to convert between drawing and actual measurements
Finding actual size: Multiply the drawing measurement by the scale factor: actual = drawing × scale factor
Finding drawing size: Divide the actual measurement by the scale factor: drawing = actual ÷ scale factor
Proportion method: Setting up drawing/actual = drawing/actual and cross-multiplying to solve for the unknown
1:100 scale: Every 1 unit on the drawing equals 100 of the same units in real life
Similar figures: Figures with the same shape but different sizes; scale drawings always produce similar figures