https://tapintoteenminds.com/3actmat... In a previous 3 Act Math Task, students watch a short video that shows a cone pouring water twice into a sphere with the same radius/height to fill it to the top. Because it takes two cones to fill one sphere, we can use the volume of a cone formula as a starting point to derive the volume of a sphere. We do this visually using animations in Apple Keynote to make connections between concrete and algebraic representations.