Heron's Calculation of Triangle Area (MSTE)
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http://www.mste.uiuc.edu/dildine/heron/triarea.html  


James P. Dildine; University of Illinois at UrbanaChampaign (UIUC)  
The area of a triangle can be calculated using a formula attributed to Heron of Alexandria. This calculation requires that the lengths of all three sides be known. This activity includes an Excel file to calculate the area of a triangle, and Java and Sketchpad files to experiment with interactive triangles. Explore the Triangle Inequality Theorem while exmining the acceptable ranges for the third side of a triangle.  


Levels:  Middle School (68), High School (912) 
Languages:  English 
Resource Types:  Lesson Plans and Activities, Problems/Puzzles, Documents/Sketches/Galleries, General Software Miscellaneous, Geometer's Sketchpad, Web Interactive/Java 
Math Topics:  Triangles and Other Polygons 
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