Volume and Surface Area of Pyramids, Cones, Spheres
🎬 Video Tutorial
(0:18) Volume of Pyramids and Cones: $\frac{1}{3} \times \text{base area} \times \text{height}$, where height is always perpendicular to the base.(0:37) Surface Area of Pyramids: Add the base area and the areas of all triangular sides.(1:50) 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.(3:00) Volume and Surface Area of Spheres: Remember, volume requires $r^3$, while surface area needs $r^2$.
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