How to write the mathematical conclusion that primary school is established and junior high school is not established?

1, the equilateral triangle is an acute triangle, and the internal angles of the equilateral triangle are all equal, which are all 60.

2. The midline, height line and bisector of each side of an equilateral triangle coincide (the three lines are one).

3. An equilateral triangle is an axisymmetric figure with three axes of symmetry, and the axis of symmetry is the straight line where the median line, height line or bisector of each side is located.

4. Important data of equilateral triangle.

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