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Demonstrations 121  140 of 161
The Area of the Excentral Triangle
Estimating the Surface Area and Volume of a Rectangular Prism
Estimating the Side Length of a Square from Its Area
Percentage Change
Rectangles: Perimeter and Area
The Area of a Triangle, its Circumradius, and the Perimeter of its Orthic Triangle
Medial Division of Triangles
The Product of the Inradius and Semiperimeter of a Triangle
The Product of the Side Lengths of a Triangle
Relations between Some Triangles Associated with Excircles
Estimating Perimeter and Area of Simple Polygons
Signed Area of a Polygon
The Area of a Triangle inside the Incircle
A Relation between the Areas of Four Triangles
Three Subtriangles of a Triangle
The Area of the Contact Triangle
Area of a Parallelogram
Monte Carlo Methods to Estimate Area
The Carpets Theorem
The Area of a Triangle as Half a Rectangle
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