In the square with side length 6, there is a triangle bef, and the line segments AE = 3, DF = 2

In the square with side length 6, there is a triangle bef, and the line segments AE = 3, DF = 2

According to the stem analysis, we can get: 12 × (3 × 6 + 2 × 3 + 4 × 6), = 12 × (18 + 6 + 24), = 12 × 48, = 24, 6 × 6-24, = 36-24, = 12, a: the area of shadow is 12