1.3 composite objects
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6.3 Surface Area Composite Objects
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Composite Objects
Composite objects are objects that are made up of several objects.
They can be broken down into pieces
How do we solve these?
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Example 1. Find the surface area for the following object:
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Example 2. Find the surface area of the following object if each cube has a side length of 1 cm.
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Example 3. Consider the solid shown, in which all angles are right angles.
a. What are the dimensions of the cutout piece?
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Example 3. Consider the solid shown, in which all angles are right angles.
b. What is the total surface area of the solid?
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Example 4. Your sister is getting married! You want to make a cake for her that has four layers. You want to cover the cake with icing. Calculate the total surface area you need to cover with icing. The heights of the layers are all 20, and the diameters of the cylindrical layers are 60, 70, 80, 90 cm respectively
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Example 5. Find the surface area of the following object.
Homework
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Investigation Filing Cabinet
Watch this:
http://vimeo.com/40917688
In a group of 3 find out how many PostIts will it take to cover the entire Filing Cabinet.
On the whiteboard record your groups guesstimate.
Let's see the answer:
http://vimeo.com/41227350
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Assignment: page 3135#2, 3, 4, 7, 8, 9 ,1415, 19
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CHALLENGE!!