A dodecagon is a 12 sided shape made from 10 triangles
An heptagon which is a 7 sided shape made from 5 triangles
Yes.
It would depend on the triangles, but assuming they were equilateral or isosceles, a trapezoid if alternated in a line.
Triangular Prism
A dodecagon is a 12 sided shape made from 10 triangles
An heptagon which is a 7 sided shape made from 5 triangles
a geometric shape made up of 20 triangles. :)
Yes.
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A tetrahedron; a shape made of four triangles.
It would depend on the triangles, but assuming they were equilateral or isosceles, a trapezoid if alternated in a line.
square
Triangular Prism
Triangular prisms and Rectangular pyramids
Absolutely. Any two congruent right triangles will form a rectangle, and if the right triangles are isosceles right triangles, they will form a square.
Two right triangles, when joined together by their hypotenuses (the side opposite the right angle), will form a rectangle.