Scale Factor and Scale Drawings

Scale Factor and Scale Drawings

A scale factor of less than 1

Reduction

A scale factor of greater than 1

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Enlargement

Scale Factor Changes the size of a shape proportionally

Labelling

Is each example an of enlargement, reduction or did it stay the same?

Drag labels to their correct position on the image

Same

enlargement

reduction

Figure 1 42 18

--------- = ---- = ----

Figure 2 35 15

Set up proportions

Scale Factor

Draw

What is the scale factor for these figures

Sophie drew a scale drawing of a house and its lot. The back patio is 3 centimeters wide in the drawing. The actual patio is 18 meters wide. What scale did Sophie use for the drawing?

Set up proportions

Scale Drawing

Multiple Choice

A map is drawn with a scale of 1 inch = 15 miles. Nicole measured the distance to the next town as 3 inches. How many miles does she have to travel to get to the next town?

• 12 miles

• 15 miles

• 30 miles

• 45 miles