Answer : Yes, in a way. But not the "solving equations" kind of math. The math used in interior design is more so problem-solving and spatial reasoning. One must first ask themselves how to create space and then what furniture or decor will fill that space before one finalizes things with color schemes and details (textures, patterns, etc.). Therefore, there are a number of skills required including basic geometry, understanding measurements like scale ratios between two large objects or the relationship between ceiling height to rug heights for an even floor surface (see Pythagorean theorem).