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2.3 Similar Triangles


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Last updated 26 October 2012 15:30 by NZTecAdmin

Give each pair of learners 6 equal length pipe cleaners.

Ask them to make a triangle using the full lengths of 3 of the pipe cleaners. Ask them how many triangles they can make with 3 fixed lengths?

Get the learners to fold the other 3 pipe cleaners in half and make a triangle from the 3 half-lengths. Discuss how the 2 triangles are the same and how they are different. The two triangles are ‘similar triangles’; what does this mean?

Similar triangles have the same angles and the corresponding sides are proportional. Visually, they look the same, but one is ‘bigger’ than the other.

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