Scale drawingsScale drawings

Scale drawingsScale drawings

Scale drawings are used when it is Scale drawings are used when it is unrealistic to think about drawing an object unrealistic to think about drawing an object in its actual size; so we need to “in its actual size; so we need to “scalescale” ” them downthem down

Observe…Observe…

Scale drawingsScale drawings

2cm

These shapes were drawn using the scale These shapes were drawn using the scale 1cm = 5m1cm = 5m

Find the actual sizes of the shapesFind the actual sizes of the shapes

5cm

3cm

4cm

Scale drawingsScale drawings

2cmThe squares sides The squares sides measure 2cm on the measure 2cm on the scale drawingscale drawing

If the scale is 1cm:5m If the scale is 1cm:5m the actual size of the the actual size of the sides of the square sides of the square would be…would be…

2 x 5m = 10m 2 x 5m = 10m

10m

Scale drawingsScale drawings

5cm

3cm

4cm

25m

15m

20m

The sides of the triangle The sides of the triangle measure 3cm, 4cm and measure 3cm, 4cm and 5cm on the scale drawing5cm on the scale drawing

The actual measurements The actual measurements of the triangle would be of the triangle would be

3 x 5m = 15m3 x 5m = 15m

4 x 5m = 20m4 x 5m = 20m

5 x 5m = 25m5 x 5m = 25m