How Do We Find Surface Area and Lateral Area of Prisms?

A Prism is a 3-D shape that has two parallel faces, also known as bases, that are as well congruent polygons. Each of the faces of the prism is a rectangle (Right Prism) and in geometry they are known as Lateral Faces. The joining edges and faces are perpendicular to the base faces. 


Finding the Surface Area of a prism is very simple. All you do is add the area of the lateral faces with the areas of the bases. 


S.A.: 2LW+2LH+2HW
L.A.: ph


L: length
H: height
W: width
p: perimeter of the base
h: height 

How Do We Identify Solids?

In geometry there are a whole bunch of different shapes. There is a term called SOLID GEOMETRY. Solid Geometry is the geometry of 3-D shapes. There are two types of solids: Polyhedra and Non-Polyhedra 


 -Polyhedra: a 3-D solid figure in which each side has a flat surface. Those surfaces are polygons that are joined at their edges. A Polyhedron has NO CURVED SURFACES!!!! 
          • Called regular if the faces are Congruent 
          • Also if the Regular Polygons and the same number of faces meet at each vertex.
 Example: Pyramid, Prism. 


 -Non Polyhedra: a 3-D figure that has cures in their shape. 
 Example: Cylinder, Cone, Sphere.