Make a triangle out of straws or something. See if you can push it sideways like a square. I you try to, you either bend it, break it or push the entire thing sideways...
You can't bend it like a square. this is why triangles is the strongest shape. And also tall skyscrapers are made from triangles if looked from a birds eye-view...
:D:D:D
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Those would be SIMILAR triangles.
They are triangles with 3 equal sides and 3 equal interior angles or triangles that are congruent in shape
Some triangles are symmetric, while others are not. All equilateral and isosceles triangles are symmetric.all triangles are symmetric.
There is no 3D shape with 6 faces: 4 rectangles and 2 triangles. See the link for all forms of hexahedra.
a geometric shape made up of 20 triangles. :)