Surface Area of Prisms
Lesson Objective
Students will work with a formula for the
surface area of a prism.
Lesson Beginning
In your own words, define surface area.
List 3 real life examples where you would need
to find surface area.
Surface Area of Prisms
Surface area of a polyhedron is the sum of the
areas of its faces.
The surface area of any prism is the sum of the
areas of the bases and the lateral faces.
S = areas of bases + areas of lateral faces
Surface Area of a Rectangular Prism
• SA = 2(lw + lh + wh)
Surface Area of Triangular Prisms
• SA = Area of three rectangles + Area of two
triangles
Modeling
Find the surface area of the prism.
Practice
Find the surface areas of the rectangular prisms
Modeling
Find the surface area of the prism.
Practice
Find the surface areas of the triangular prisms
Practice
Fifty percent of the surface area of the bread is
crust. What is the height h?
Practice
Which prism has the greater surface area?
Practice
Draw and label a rectangular prism that has a
surface area of 158 square yards.
Practice
Find the surface area.