Area and Perimeter of Triangles: Triangles Inside and Out
This is one lesson in a larger Unit Plan that covers many properties of triangles and several other theorems. It has proofs, real world problems, constructions, a unit project, assessments, and more. In Lesson 7, “Triangles Inside and Out (Area and Perimeter of Triangles)”, students investigate the relationship between triangle perimeter and area, and includes real world connections. The entire unit plan can be found here. This lesson includes the use of an applet that allows for manipulation of a triangle on a computer. This could be used individually in the computer lab, or in a group setting on an interactive board.
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