Dissection of 3 Equal Triangles and 1 Smaller Similar Triangle into One

Problem

Dissect $3$ equal triangles and $1$ smaller triangle, similar to those $3$, and assemble the pieces into one large triangle.

Solution

Note that the larger triangle is not similar to its components.

$\blacksquare$

Sources

• June 1975: David Wells: On Gems and Generalisations (Games and Puzzles  no. 37)
• 1992: David Wells: Curious and Interesting Puzzles ... (previous) ... (next): Abul Wafa ($\text {940}$ – $\text {998}$): $42$