can any two triangles be joined to make a rhombus

No because if i took a scalene triangle I would not get a rhombus

Yes

1. join two equilateral triangles
2. two congruent isosceles triangles, joined at the non-equal sides.

No, any two triangles cannot be joined to make a rhombus. A rhombus is a quadrilateral with all sides equal in length. In order to create a rhombus, the two triangles must have adjacent sides of equal length and their shared side should be equal in length to the sum of their other two sides. This is not possible with arbitrary triangles, as their sides and angles can vary widely.

No, any two triangles cannot be joined to make a rhombus.

A rhombus is a quadrilateral with four sides of equal length. On the other hand, a triangle is a polygon with three sides.

To join two triangles and create a rhombus, you would need to take specific triangles that satisfy certain conditions. In this case, you would need to choose two congruent (or identical) isosceles triangles and join them together.

An isosceles triangle has two sides of equal length. By joining two congruent isosceles triangles along one of their congruent sides, you can create a rhombus. Each triangle will form one pair of opposite sides, while the shared side will become another pair of opposite sides. The resulting shape will have four sides of equal length, making it a rhombus.

So, in summary, any two triangles cannot be joined to form a rhombus. You would need two congruent isosceles triangles to join together and create a rhombus.