Toothpick Transfer

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Readjust a diagram to form a number of triangles.

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Hidden Triangles

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Count the number of triangles in a picture.

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SAM

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Explore Symmetry with Altitudes and Medians.

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Triangular Numbers

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Explore the sequence of triangular numbers.

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Triangles Inscribed Inside Triangles

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Explore properties of triangles constructed using the midpoint of given triangles.

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Constructing Isosceles Triangles

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Explain how to construct isosceles triangles.

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Tiling

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Tile a square patio with triangular tiles.

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Slicing Triangles

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Cut any given triangle into triangles of equal area.

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Prime Scalene

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Find the smallest possible perimeter of a scalene triangle.

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Triangles Inside a Trapezoid

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Use the area of a triangle to transform a trapezoid into different quadrilaterals.

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