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Demonstrations 101  120 of 163
The Trapezoidal Rule for Increasing Functions
A Visualization of Logarithms
Visual Proof of Two Integrals
Visual Computation of an Integral (II)
The Ratio of Surface Area to Volume for a Cube and a Sphere
Dividing a Triangle by Lines Parallel to Two Sides
Subtriangles Formed by Concurrent Lines Parallel to the Sides of a Triangle
The Area of the Incentral Triangle
Areas of Parallelograms and Trapezoids
Sum of Reciprocals of Triangular Numbers
The ArithmeticLogarithmicGeometric Mean Inequality
Visual Computation of an Integral
Calculating Area, Perimeter, and Diagonal Length of a Rectangle
Area of a Hexagon Formed by the Vertices and Altitude Extensions of a Triangle
Two Triangles of Equal Area on Either Side of an Angle Bisector
The Product of the Inradius and Three Exradii
Another Relation between the Areas of Triangles Associated with an Excircle
On the Areas of Triangles Associated with an Excircle
The Sum of the Square Roots of the Areas of Three Subtriangles
Routh's Theorem
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