Question

Mei has a large triangular stone that she wants to divide into four smaller triangular stepping stones in a pathway. Explain why cutting along each midsegment creates four congruent stepping stones.

Answer 1

Recall that the segment joining the midpoints of two sides of a triangle is parallel to the third side and has measure (1/2) that of the third side.
@MsJasmine1

Answer 2

As @matricked explained, each triangle has three midsegments and each is parallel to the third side. So by joining the midpoints you are cutting the triangle in half and there is most likely a test or proof you could use to show how they become congruent.As written by @eSpeX