1. **State the problem:** Find the area of trapezoid PKW with parallel sides 1.3 mm and 2.5 mm, and height 0.5 mm. 2. **Formula for the area of a trapezoid:** $$\text{Area} = \frac{(\text{Base}_1 + \text{Base}_2)}{2} \times \text{Height}$$ 3. **Identify the bases and height:** - Base 1 = 1.3 mm - Base 2 = 2.5 mm - Height = 0.5 mm 4. **Substitute values into the formula:** $$\text{Area} = \frac{(1.3 + 2.5)}{2} \times 0.5$$ 5. **Simplify inside the parentheses:** $$\text{Area} = \frac{3.8}{2} \times 0.5$$ 6. **Show cancellation when dividing:** $$\text{Area} = \cancel{\frac{3.8}{2}} \times 0.5 = 1.9 \times 0.5$$ 7. **Multiply to find the area:** $$\text{Area} = 0.95$$ 8. **Final answer:** The area of trapezoid PKW is **0.95 square millimeters**.