1. **State the problem:** We need to find the perimeter of an irregular "C"-shaped polygon with sides 11 cm, 4 cm, 6 cm, 3 cm, and 20 cm. 2. **Recall the formula for perimeter:** The perimeter of a polygon is the sum of the lengths of all its sides. 3. **List the sides:** The sides given are 11 cm, 4 cm, 6 cm, 3 cm, and 20 cm. 4. **Calculate the perimeter:** $$\text{Perimeter} = 11 + 4 + 6 + 3 + 20$$ 5. **Add the lengths:** $$11 + 4 = 15$$ $$15 + 6 = 21$$ $$21 + 3 = 24$$ $$24 + 20 = 44$$ 6. **Final answer:** The perimeter of the shape is $$44\text{ cm}$$.