This past nine weeks, we’ve been mainly focusing on the volume and surface area of 3-D shapes like prisms, cylinders, cones, etc. The easiest shape to find the volume to me is a sphere because it’s really just step by step and the concept is simple to grasp. The formula of volume for a sphere is V= 1/2(4/3πr^3). The r represents the radius. The hardest shape to find the volume of to me is a pyramid because it’s just really confusing when I see all the numbers jumbled up and makes me doubt myself. The volume of regular pyramid is V=1/3(Ah). The A represents area and h represents height. The volume of a cylinder is V=πr^2h, and h in this formula stands for height. The volume of a cone is V= πr^2(h/3), and again, r is radius and h is the height. Finally, the volume of a rectangular prism is V=lwh, and l stands for length, w is width, and h is height.
This is an example of a rectangular prism.
Jillian Pou Geometry Blog 