{"step_by_step": ["Area of the square = side × side = 10 cm × 10 cm = 100 cm².", "Area of the removed triangle = 1/2 × base × height = 1/2 × 6 cm × 4 cm = 12 cm².", "Area of the remaining figure = Area of square - Area of triangle", "Area = 100 cm² - 12 cm² = 88 cm²."], "key_formulas": ["Area of square = side × side", "Area of triangle = 1/2 × base × height"], "common_mistakes": ["Forgot to divide by 2 for the triangle's area.", "Added the area of the triangle instead of subtracting."]}