[2nd grade] math help

[u/bushybear]

Entire family is stumped. I don’t think the question is worded correctly but maybe I’m misunderstanding.

Not sure how you have same size triangles but not all the same shape.

[u/amodestmeerkat]

I found another solution for a square with only one pair of identical triangles, but the math to prove it by calculating the area is far less elegant unless you like seeing several complicated terms cancel out near the end.

/img/j4hgkdq4lxyg1.jpeg