How many triangles are formed?
Place the digits 1 through 9 in the circles in a very special way.
Determine the number of triangles in the diagram.
Use three lines to form as many triangles as possible.
Draw lines to find the largest amount of triangles.
Readjust a diagram to form a number of triangles.
Count the number of triangles in a picture.
Explore Symmetry with Altitudes and Medians.
Explore the sequence of triangular numbers.
Explore properties of triangles constructed using the midpoint of given triangles.
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