1. The problem is to understand how to find the areas of triangles and rectangles. 2. The formula for the area of a rectangle is $$\text{Area} = \text{length} \times \text{width}$$. 3. The formula for the area of a triangle is $$\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$$. 4. Important rules: - For rectangles, multiply the length by the width. - For triangles, multiply the base by the height and then divide by 2. 5. Example for a rectangle: If length = 5 and width = 3, then area = $$5 \times 3 = 15$$. 6. Example for a triangle: If base = 6 and height = 4, then area = $$\frac{1}{2} \times 6 \times 4 = \frac{1}{2} \times 24 = 12$$. 7. These formulas help you calculate the space inside these shapes easily. Final answer: Use $$\text{Area}_{rectangle} = \text{length} \times \text{width}$$ and $$\text{Area}_{triangle} = \frac{1}{2} \times \text{base} \times \text{height}$$ to find areas.