Answer:
24 cm
Explanation:
The triangle must have the ratio of 6:7:9 for side lengths. If the triangle had these exact sides then the perimeter would be 6 + 7 + 9 = 22 cm. Since the triangle has 88 cm as its perimeter then 22*4 = 88. This means multiplying by a scale factor of 4 will give the side length.
6 * 4 = 24
7* 4 = 28
9 * 4 = 36
The perimeter is 24 + 28 + 36 = 88 cm.
The shortest side is 24.