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Surface Area of Triangular Prisms Greg Morrison

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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

Page 4: 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

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.

Page 5: 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

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

Page 7: 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

Side 1 ½(9 × 4) 18 cm2

Side 2 ½(9 × 4) 18 cm2

Side 3 4.5 x 8.1 36.45 cm2

Side 4 9 x 8.1 72.9 cm2

Side 5 7.2 x 8.1 58.32 cm2

TOTAL 203.67 cm2

Page 8: 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

Practice Time!

Page 9: 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

Find the Surface Area

Page 10: 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

Find the Surface Area

8.5 cm2.2 cm

2 cm

Page 11: 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

Find the Surface Area

5 cm3 cm

Page 12: 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

Find the Surface Area

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