Geometry Area

Geometry with Area

By Courtney Tout

Before we begin:

Make sure you have the following:

Reference Sheet

Whiteboard + Marker + Eraser​

Multiple Choice

What formula would you use to calculate the Area of a Triangle?

• A = pi x r x r

• A = b x h

• A = (b1+b2)h/2

• A = 1/2 x b x h

Composite Figures combination shapes.

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To find the Area of Compiste Figures: We Add all Area​​s together

Area of a Composite Figure

Multiple Choice

What is the area of this composite shape?

Hint: Find Area of Triangle

+

Area of Rectangle

• 14 in²
• 68 in²
• 36 in²
• 24 in²

Multiple Choice

Find the Area of the Composite Figure:

Hint: Find Area of Long Rectangle

+

Area of Short Rectangle

• 54 cm2
• 45 cm2
• 63 cm2
• 36 cm2

Multiple Choice

What is the area of the shaded region?

Hint: FInd Area of Large Square

-

Area of Small Square

• 4 cm2

• 16 cm2

• 8 cm2

• 12 cm2

Multiple Choice

What is the area of the composite shape?

Hint: Area of Rectangle

+

Area of Triangle

• 40 ft2

• 9 ft2

• 61 ft2

• 49 ft2

Multiple Choice

Calculate the area. Use 3.14 for pi. Round to the nearest tenth if needed.

• 61.2325 cm ²

• 61.2 cm ²

• 195.9 cm ²

• 90.1 cm ²

Multiple Choice

Calculate the area. Use 3.14 for pi. Round the nearest tenth if needed.

• 57.1 m ²

• 32 m ²

• 58 m ²

• 57.12 m ²

Multiple Choice

Calculate the area. Use 3.14 for pi. Round to the nearest tenth if needed.

• 50.2 m ²

• 23.1 m ²

• 14.7 m ²

• 25.6 m ²

​We name them by using their Base Shapes and Sides:

Base: Side:

• Rectangular​ - Rectangle = Prism

• Triangular - Triangle = Pyramid​

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Geometric Solids & Nets

Multiple Choice

Which figure will this net make?

• Rectangular Prism 
• Triangular Prism
• Triangular Pyramid 
• Cube

Multiple Choice

Which figure will this net make?

• Rectangular Prism 
• Triangular Prism
• Triangular Pyramid 
• Cube

Multiple Choice

Which figure will this net make?

• Cone
• Triangular Prism
• Square Pyramid 
• Cube

Multiple Choice

Which figure will this net make?

• Triangular Pyramid
• Hexagonal Pyramid
• Octagonal Pyramid 
• Cube

Multiple Choice

• Triangular Prism
• Rectangular Prism
• Cone
• Triangular Pyramid

Multiple Choice

• Rectangular Prism
• Triangular Prism
• Triangular Pyramid
• Rectangular Pyramid

Multiple Choice

Name the shape.

• Triangular Prism

• Rectangular Pyramid

• Rectangular Prism

• Triangular Pyramid

Multiple Choice

Name the shape.

• Rectangular Pyramid

• Triangular Prism

• Triangular Pyramid

• Rectangular Prism

This is the COMBINED Areas of each side of the figures.

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Main Formulas we Use:

• Triangle

• A=​ 1/2 x b x h

• Rectangle​

• A = b x h​

​

​Some text here about the topic of discussion.

​Surface Area

​_ + ​_ + ​_ + ​_ + ​_ + ​_ = ____

​

​

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Multiple Choice

Surface area is.......

• filling in a 3 dimensional shape

• wrapping the outside of a 3 dimensional shape

Multiple Choice

How many square centimeters of wrapping paper are needed to cover the surfaces of the box?

• 108 cm²

• 324 cm²

• 180 cm²

• 432 cm²

Multiple Choice

What is the TOTAL surface area of the triangular prism shown.

• 960 cm²

• 448 cm²

• 256 cm²

• 544 cm²

Multiple Choice

Find the surface area of the rectangular prism.

• 29 cm²

• 912 cm²

• 348 cm²

• 438 cm²

Multiple Choice

What is the total surface area of this shape?

• 50 cm²

• 700 cm²

• 900 cm²

• 50,000 cm²

Multiple Choice

Find the surface area of the cube in square cm.

• 25

• 150

• 125

• 75

Multiple Choice

Find the surface area of the rectangular prism in square in.

• 160

• 192

• 325

• 352

Multiple Choice

Find the surface area of the triangular prism in square cm.

• 48

• 176

• 200

• 224

Multiple Choice

Find the surface area of the square pyramid in square in.

• 340

• 240

• 580

• 480

Multiple Choice

Find the surface area of the triangular prism in square cm.

• 270

• 390

• 60

• 330

Multiple Choice

Find the surface area of the triangular pyramid in square in.

• 211.2

• 90

• 105.6

• 195.6

Poll

How do you feel about:

Area of Composite Figures

Surface Area of 3D Shapes

• I will never get this

• I need more practice

• I am getting this

• I am an expert