Like this presentation? Why not share!

Using ratios in scale drawing

by Doug Taylor, Working at Western Academy of Beijing on May 15, 2012

• 1,079 views

Views

Total Views
1,079
Views on SlideShare
1,079
Embed Views
0

Likes
0
9
0

No embeds

Categories

Uploaded via SlideShare as Apple Keynote

Using ratios in scale drawingPresentation Transcript

• SCale
• SCale SCale
• SCale SCale SCale
• SCale SCale SCale
• A scale is a ratio of size in a map, model, plan or drawing. Ratios are a way to compare two numbers or quantities.
• 2cm 2cm
• 4cm 4cm
• 4cm2cm 2cm 4cm Scale: 1cm = 2 cm Ratio: 1: 2
• 4cm 4cm
• 12cm 12cm
• 12cm4cm 4cm 12cm Scale: 1cm = 3 cm Ratio: 1: 3
• 15cm 10cm
• 3cm 2cm
• 15cm 3cm 2cm 10cm Scale: 5 cm = 1 cm Ratio: 5:1
• Now it’s your turn!Use Keynote to scale some images.Here’s how:1. Open Keynote2. Create a simple shape like a square or rectangle.3. Use the Inspector to make sure the length andwidth is a whole number.4. Decide on a scale you want to use.5. Duplicate the shape.6. Use your scale to enlarge or reduce the shapeusing the Inspector.