Toothpick Transfer
Readjust a diagram to form a number of triangles.
Author Archive for: corrill
Entries by InterMath
Hidden Triangles
Count the number of triangles in a picture.
SAM
Explore Symmetry with Altitudes and Medians.
Triangular Numbers
Explore the sequence of triangular numbers.
Triangles Inscribed Inside Triangles
Explore properties of triangles constructed using the midpoint of given triangles.
Constructing Isosceles Triangles
Explain how to construct isosceles triangles.
Tiling
Tile a square patio with triangular tiles.
Slicing Triangles
Cut any given triangle into triangles of equal area.
Prime Scalene
Find the smallest possible perimeter of a scalene triangle.
Triangles Inside a Trapezoid
Use the area of a triangle to transform a trapezoid into different quadrilaterals.