Are you searching for a purpose for geometric constructions? Use an engaging approach to explore dilations. Scholars create dilations using a construction method of their choice. As they build their constructed dilation, they strengthen their understanding of scale and apply it to real scenarios. 

Concepts

dilations, scale drawings, scale factors, scale models

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Additional Tags

math

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Instructional Ideas

• Have learners use graph paper when creating scale drawings to compare lengths of sides using distance formula and/or Pythagorean Theorem to verify the scale
• Allow pupils to use geometry software such as Geogebra to create scale drawings
• The first lesson in a 36-part series

Classroom Considerations

• Pupils need construction tools to complete the drawings
• Activity may require a review of scale and constructions depending on the background knowledge of your students

Pros

• Uses good examples to stress the idea that dilations must preserve angle measurements
• Contains a complete lesson from opening exercise and independent practice problems to the included exit ticket

Cons

• None

Common Core

HSG-SRT.A.1.a HSG-SRT.B.4 HSG-MG.A.3 MP5