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Equilateral triangles
Everything, since they are one.
All their angles are less than 90 degrees.
They are both triangles
they both have straight edges
Equilateral triangles
they are both angkes
Everything, since they are one.
Their faces are equilateral triangles.
All their angles are less than 90 degrees.
They are both triangles
2+10000
they both have straight edges
two isosceles triangles with common line
triangles
They are both regular polygons.
they both have straight edges