Copyright Tim Morris/St Stephen's School

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Copyright Tim Morris/St Stephen's School Area of a Triangle www.mathxtc.com This is one in a series of Powerpoint slideshows to illustrate how to calculate the area of various 2-D shapes. Start with the Rectangle, then move onto the Parallelogram. After that select any of Triangle, Trapezium and Circle. Please feel free to copy and modify any of these slide shows, but make sure you acknowledge the author when doing so. Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School TRIANGLE L=length H=height What is the area of this triangle? W=width Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School TRIANGLE L=length H=height What is the area of this triangle? W=width COPY THIS! Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School TRIANGLE L=length H=height What is the area of this triangle? W=width PASTE HERE! Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School TRIANGLE L=length H=height What is the area of this triangle? W=width FLIP VERTICALLY! Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School TRIANGLE L=length H=height What is the area of this triangle? W=width FLIP HORIZONTALLY! Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School TRIANGLE L=length H=height What is the area of this triangle? W=width TRANSLATE TO HERE! Copyright Tim Morris/St Stephen's School

Copyright Tim Morris/St Stephen's School TRIANGLE The area of the triangle is ½ the area of this parallelogram? L=length H=height W=width Copyright Tim Morris/St Stephen's School

Area = ½ (Width x Height) (perpendicular height H) TRIANGLE H=height Area = ½ (Width x Height) (perpendicular height H) W=width Copyright Tim Morris/St Stephen's School

Area = ½ (Width x Height) (perpendicular height H) TRIANGLE H=height Area = ½ (Width x Height) (perpendicular height H) W=width Copyright Tim Morris/St Stephen's School

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