
A privacy-conscious worked example with the original question, step-by-step reasoning, common traps, and similar practice.
Guided solution
To solve this problem, we need to understand the repeating pattern of shapes and calculate the total number of sides for 8 shapes.
The problem requires understanding a repeating pattern and calculating the total number of sides, which involves both pattern recognition and basic multiplication.
The pattern '1 triangle, 1 triangle, 1 square' repeats every 3 shapes. Each triangle has 3 sides and each square has 4 sides. For 8 shapes, the pattern repeats twice with 2 extra triangles, resulting in a total of 28 sides.