Volume of Pyramids and Cones: $\frac{1}{3} \times \text{base area} \times \text{height}$, where height is always perpendicular to the base.

Surface Area of Pyramids: Add the base area and the areas of all triangular sides.

Surface Area of Cones: Add the base circle area ($\pi \times r^2$) and the lateral surface area ($\pi \times r \times s$), where $s$ is the slant height.

Volume and Surface Area of Spheres: Remember, volume requires $r^3$ (cubed), while surface area needs $r^2$.

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