Surface Area With and Without Nets

Surface Area With and Without Nets

Surface area: the sum of the area of all its faces

Multiple Choice

What is surface area?

• Where the base of a triangle and rectangles are put together

• The sum of the area of all of the faces in a 3-Dimmensional figure

• How would I know?!?

• Where you do length x width x height

Surface Area of Nets

• Every face has a twin!

• Top/Bottom: 50 cm²

• Left/Right: 15 cm²

• Front/Back: 30 cm²

Multiple Choice

What is the area of the front/back? (The orange letters)

• 20 cm²

• 12 cm²

• 25 cm²

• 16 cm²

Multiple Choice

What is the area of the left/right? (The green letters)

• 20 cm²

• 25 cm²

• 15 cm²

• 9 cm²

Multiple Choice

What is the area of the top/bottom? (the yellow letters)

• 16 cm²

• 15 cm²

• 12 cm²

• 9 cm²

Fill in the Blank

Now that you have the area of each face, what is the total surface area?

Multiple Choice

What is the area of the front/back? (The orange F/B)

• 128 cm²

• 84 cm²

• 48 cm²

• 96 cm²

Multiple Choice

What is the area of the top/bottom? (The yellow T/B)

• 128 cm²

• 84 cm²

• 48 cm²

• 96 cm²

Multiple Choice

What is the area of the left/right? (The green L/R)

• 128 cm²

• 84 cm²

• 48 cm²

• 96 cm²

Fill in the Blank

What is the total surface area? Add all of the faces together! (remember two of each face!)

Fill in the Blank

What is the surface area of the rectangular prism?

Surface Area of Triangular Prisms

• Triangular Prisms: 5 faces

• 3 Rectangles & 2 Triangles

• Triangles have the same area

• At least 2 of the rectangles have the same area

Multiple Choice

What is the area of each triangle?

• 48 cm²

• 24 cm²

• 80 cm²

• 40 cm²

Multiple Choice

What is the area of each rectangle?

• 48 cm²

• 170 cm²

• 68 cm²

• 136 cm²

Fill in the Blank

What is the total surface area of the triangular prism? (Add the area of all 3 rectangles & 2 triangles)

Fill in the Blank

What is the total surface area? (Add the area of both triangles & the 3 rectangles)

Surface Area Without Nets

• You simply need to remember what shapes the prisms are made of:

• Rectangular Prism: Front/Back, Top/Bottom, Left/Right

• Triangular Prism: 2 Triangles & 3 Rectangles

Multiple Choice

What is the surface area of the rectangular prism? (Use the format below to help you)

Top

Bottom:

Left:

Right:

Front:

Back:

• 100 cm²

• 50 cm²

• 88 cm²

• 126 cm²

Multiple Choice

What is the surface area of the rectangular prism? (Use the format below to help you)

Top

Bottom:

Left:

Right:

Front:

Back:

• 100 cm²

• 198 cm²

• 99 cm²

• 135 cm²

Multiple Choice

What is the surface area of the triangular prism? (Use the format below to help you)

Triangle:

Triangle:

Rectangle:

Rectangle:

Rectangle:

• 145 cm²

• 312 cm²

• 288 cm²

• 144 cm²

Poll

On a scale of 1-5 how confident are you on finding surface area? (1 being the least confident and 5 being the most confident)

• 1

• 2

• 3

• 4

• 5