Make a tetrahedron (three sided pyramid) Make it three dimensional. have the base be a triangle and then make three sides on it like a triangle pyramid.
Triforce.
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Yes, Four Triangles make a rectangle.
There are 4 triangles that make up a pyramid. 4 on the sides and on the bottom a square or rectangle.
circle
1 rhombus 4-5 triangles
Two equilateral triangles can form a rhombus- it can also be formed by using a higher number of isosceles triangles.