Put two identical triangles together into a parallelogram. The side lengths of the triangles are 7cm, 6cm and 3cm respectively. The parallelogram is made of two identical triangles The longest is () cm and the shortest is () cm

Put two identical triangles together into a parallelogram. The side lengths of the triangles are 7cm, 6cm and 3cm respectively. The parallelogram is made of two identical triangles The longest is () cm and the shortest is () cm

The longest circumference is (26) cm and the shortest is (18) cm
(7＋6)×2＝26
(6＋3)×2＝18

Use two identical triangles to form a parallelogram. What are the maximum number of triangles, the minimum number of triangles? Unit: cm

A triangle has three sides (a, B, c). After rotating 180 ° with the midpoint of any side, the triangle and the original triangle form a parallelogram, and the selected rotating side is the diagonal of the parallelogram. Therefore, when a ≠ B ≠ C, two identical triangles can be combined into three parallelograms at most