Answer key for Area Sheet 6, showing solutions to four irregular shape area problems with measurements and calculations.

- For shape 1: Divide the L-shape into two rectangles. The top rectangle is 9 cm by 3 cm (area = 27 cm²). The bottom right rectangle is 4 cm by 5 cm (area = 20 cm²). Total area = 27 + 20 = 47 cm².
- For shape 2: Divide into two rectangles. The left rectangle is 6 mm by 20 mm (area = 120 mm²). The bottom right rectangle is 10 mm by 5 mm (area = 50 mm²). Total area = 120 + 50 = 170 mm².
- For shape 3: Divide into two rectangles. The large rectangle on the left is 8 cm by 8 cm (area = 64 cm²). The smaller rectangle on the right is 4 cm by 5 cm (area = 20 cm²). Total area = 64 + 20 = 84 cm².
- For shape 4: Divide into two rectangles. The left rectangle is 1.5 m by 5 m (area = 7.5 m²). The bottom right rectangle is 3.5 m by 3 m (area = 10.5 m²). Total area = 7.5 + 10.5 = 18 m².