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Worksheets4.39-4.41 UNION, SUBTRACT, & INTERSECT
Total questions: 12
Worksheet time: 20mins
Match the following commands with their functions
Combines two or more 3D objects into one.
3D UNIONS
Removes overlapping volume of 3D objects from another.
SUBTRACTS
Creates a 3D object from overlapping volume of others.
INTERSECT
Assign these examples to the correct categories according to their commands.
A sculpture created by merging two solids.
A pipe system with interconnected sections.
An architectural model merging several solid structures
A tool with a grip created by removing material
A hollow cube (imagine a box with no top)
A chair model developed by blending different geometrical shapes
Mid-century clocks uniquely shape via union and subtraction principles.
Petra's rock-cut architecture stunningly showcases the subtractive design method.
Statue of Liberty unifies multiple components, exemplifying 'union' principle beautifully.
Type (a) to use the UNION command.
Type (b) to use the SUBTRACT command.
Type (c) to use the INTERSECT command.
Reorder the following steps for the subtract command
Type 'SUB' or select 'SUBTRACT' command
Specify the 3D solids, surfaces, or regions to keep or be modified by subtraction.
Specify the 3D solids, surfaces, or regions to subtract.
Press enter to complete the command.
Match the following misconceptions and solutions
Subtract' merges; use 'separate' to disconnect.
Why are my objects connected?
Use to retain overlapping regions between objects.
When do I use 'intersect' command?
Select the object to keep first, press enter, then select the object to remove, enter again.
Why isn't subtraction working?
Name three products designed using subtract or union commands.
Name three products designed using intersect command.
How confident do you feel using the "subtract" command in AutoCAD?
Not confident at all
Slightly confident
Moderately confident
Very confident
Rate your understanding of the applications of the "intersect" command.
Excellent understanding
Good understanding
Basic understanding
No understanding
Which of the following commands do you find most challenging to use effectively?
Subtract
Union
Intersect
none of these commands
When should you use the 3D Intersect command in AutoCAD?
To combine two objects into one without altering their geometries.
To keep only the overlapping volume of two or more objects.
To subtract one object from another.
To create non-overlapping geometries.
