find the rule that gives the sum the lengths of all the edgesof the tetrahedron formed by
4 identical equilateral triangle as its faces

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Solution

Here it is given that tetrahedron formed by 4 equilateral triangle, that means all sides are equal.
Let the sides of equilateral triangle be x.

Sum of lengths of sides of tetrahedron is 6x.

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find the rule that gives the sum the lengths of all the edgesof the tetrahedron formed by 4 identical equilateral triangle as its faces

Here it is given that tetrahedron formed by 4 equilateral triangle, that means all sides are equal. Let the sides of equilateral triangle be x. Sum of lengths of sides of tetrahedron is 6x.

find the rule that gives the sum the lengths of all the edgesof the tetrahedron formed by
4 identical equilateral triangle as its faces

Here it is given that tetrahedron formed by 4 equilateral triangle, that means all sides are equal.
Let the sides of equilateral triangle be x.

Sum of lengths of sides of tetrahedron is 6x.