Euclidean geometry involves the planes and solid figures.
The statement is true.
Triangles can be classified based on side lengths and the measure of angles.
Of all the classification of triangles, there is only one form of equilateral triangle.
An equilateral triangle is such that have congruent measure of angles and congruent side lengths.
This means that, if the side lengths of the triangle are A, B and C, then:
[tex]\mathbf{A = B = C}[/tex]
And also, the angle in it, is:
[tex]\mathbf{\theta = 60^o}[/tex]
There are no other triangles with this feature.
Hence, the statement is true.
Read more about Euclidean geometry at:
https://brainly.com/question/21948442
