Shape 

Copyright David & Cynthia Thomas, 2009

 

Area--Directed Activity: More Triangles

                                                                    

Focus

More Triangles

Technologies

The Geometers Sketchpad and the model 5_MoreTri.gsp 

Background

Figure 5.15: More Triangles

Tasks

Using the approach developed in the directed activity Triangles and Trapezoids,

·        Find the area of the each triangle. 

·        Check your findings using The Geometers Sketchpad and the model 5_MoreTri.gsp 

·        Find an expression for the area of ΔABC in terms of the coordinates of points A, B, and C.