3cm triangle,9cm triangle, 27cm triangle, If the pattern continues,and a fourth triangle is drawn,what would be the length of a side?

27x3=71

each triangle is an equillateral, all sides equal
71/3=27 would be each side length

Each side is 3 times the previous triangle's side.

The next triangle would have side 81.

To find the length of a side in the sequence of triangles, we need to identify the pattern.

Let's analyze the given sequence:
1st triangle: 3 cm
2nd triangle: 9 cm
3rd triangle: 27 cm

When we look at the sequence, we can see that each triangle's side length is increasing by a factor of 3. In other words, each subsequent triangle is three times larger than the previous one.

Therefore, to find the length of the side in the 4th triangle, we multiply the length of the 3rd triangle's side (27 cm) by 3:

27 cm * 3 = 81 cm

Hence, the length of the side in the 4th triangle would be 81 cm.