Surface Area of Triangular Prisms Greg Morrison. Definition: The sum of the areas of all of the faces of a three-dimensional figure. Ex. How much construction.

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Presentation transcript:

Surface Area of Triangular Prisms Greg Morrison

Definition: The sum of the areas of all of the faces of a three-dimensional figure. Ex. How much construction paper will I need to fit on the outside of the shape?

A triangular prism has 5 faces. FRONT BACK RIGHT LEFT BOTTOM 2 Triangular bases 3 rectangular sides

Surface Area of a Triangular Prism If we break down our triangular prism into a net, it looks like this: In a triangular prism there are five sides, two triangles and three rectangles.

A triangular prism has 5 faces. FRONT BACK RIGHT LEFT BOTTOM

In order to find the surface area, find the area of each face. Then sum all of the areas. FRONT BACK RIGHT LEFT BOTTOM

Side 1½(9 × 4)18 cm 2 Side 2½(9 × 4)18 cm 2 Side 34.5 x cm 2 Side 49 x cm 2 Side 57.2 x cm 2 TOTAL cm 2

Practice Time!

Find the Surface Area

8.5 cm 2.2 cm 2 cm

Find the Surface Area 5 cm 3 cm

Find the Surface Area