Think you can spot every triangle at a glance? This classic brain teaser hides more shapes than you expect—let’s break it down level by level and tally them all.

We can see that the main shape is a large triangle divided by horizontal and vertical lines:

1. There are 3 horizontal lines dividing the large triangle into 4 levels.
2. There are 2 vertical lines, which divide each level into 3 parts (creating multiple smaller triangles).
3. Overall, the shape contains many small triangles, both individual and combinations of smaller ones.

Counting:

Level 1 (top):

• 1 small triangle.

Level 2:

• 2 small triangles (left and right).
• Plus 1 larger triangle formed by combining the whole level → 3 triangles in total.

Level 3:

• 3 small triangles (left, center, right).
• 2 medium triangles formed by combining two small ones.
• 1 large triangle from the entire level → 6 triangles in total.

Level 4 (bottom):

• 3 small triangles.
• 3 medium triangles (each combining two small ones).
• 1 large triangle from the full level → 7 triangles in total.

Total triangles from each level:

• Level 1: 1
• Level 2: 3
• Level 3: 6
• Level 4: 7

Additionally, triangles formed by combining multiple levels:

• Level 1 + 2: 1
• Level 2 + 3: 2
• Level 3 + 4: 3
• Level 1 to 3: 1
• Level 2 to 4: 1
• Whole large triangle: 1

Total combined triangles: 9

Final Total:

1 (level 1) + 3 (level 2) + 6 (level 3) + 7 (level 4) + 9 (combinations) = 26 triangles

✅ Answer: 26 triangles