Area of rectangles and parallelograms and triangles

The area of a rectangle is calculated using the formula: $$\text{Area} = \text{length} \times \text{width}$$ .

The area of a parallelogram is calculated using the formula: $$\text{Area} = \text{base} \times \text{height}$$ .

The area of a triangle is calculated using the formula: $$\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$$ .

The area is $$10 \times 4 = 40 \text{ cm}^2$$ .

The area is $$5 \times 3 = 15 \text{ m}^2$$ .

The area is $$\frac{1}{2} \times 8 \times 5 = 20 \text{ cm}^2$$ .

The length is $$\frac{50}{5} = 10 \text{ cm}$$ .

The area is $$\frac{1}{2} \times 10 \times 4 = 20 \text{ units}^2$$ .

The area is $$6^2 = 36 \text{ cm}^2$$ .

The area is $$12 \times 3 = 36 \text{ cm}^2$$ .