$$\text{Area} = \tfrac{1}{2} \times \text{sum of } \parallel \text{ sides} \times h$$

$$\text{Area} = \text{base} \times h_{\perp}$$

$$\text{Volume} = \dfrac{4}{3}\pi r^3$$

$$\text{Surface area} = 4\pi r^2$$

$$\text{Volume} = \dfrac{1}{3}\pi r^2 h$$

$$\text{Curved surface area} = \pi r l$$

$$\text{Volume} = \dfrac{1}{3} \times \text{base area} \times h$$

$$\text{Volume} = \pi r^2 h$$

$$\text{Curved surface area} = 2\pi r h$$

$$\text{Volume} = \text{area of cross-section} \times h$$

$$\text{Lateral surface area} = \text{perimeter of cross-section} \times h$$