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# Departmental Workshops: Enlargement

Created on 23 October 2008 by ncetm_administrator
Updated on 04 April 2013 by ncetm_administrator

# Departmental Workshops - Enlargement

These workshops are written to provide your mathematics team with structured professional development you can deliver in-house utilizing all members' expertise and knowledge. We believe 3 – 6 modules per year could be an ideal balance.

This module explores the language and notation associated with enlargement of 2D shapes and effects on areas and volumes of shapes and solids. The first activity proposes the enlargement of photographs to help students to understand the concepts.  Objectives related to this topic are:

• understand and use the language and notation associated with enlargement; enlarge 2-D shapes, given a centre of enlargement and a positive integer scale factor; explore enlargement using ICT
• enlarge 2-D shapes, given a centre of enlargement and a positive integer scale factor, on paper and using ICT; identify the scale factor of an enlargement as the ratio of the lengths of any two corresponding line segments; recognise that enlargements preserve angle but not length, and understand the implications of enlargement for perimeter
• enlarge 2-D shapes using positive, fractional and negative scale factors, on paper and using ICT; recognise the similarity of the resulting shapes; understand and use the effects of enlargement on perimeter
• understand and use the effects of enlargement on areas and volumes of shapes and solids

Overview (pdf file)
Resource Sheet HT2.ENL.1 (pdf file)
Resource Sheet HT2.ENL.2 (pdf file)
Resource Sheet HT2.ENL.4 (pdf file)
Resource Sheet HT2.ENL.5a (pdf file)
Resource Sheet HT2.ENL.6 (pdf file)

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