4.39-4.41 UNION, SUBTRACT, & INTERSECT

Match the following commands with their functions

• 3D UNIONS

• Creates a 3D object from overlapping volume of others.

• SUBTRACTS

• Combines two or more 3D objects into one.

• INTERSECT

• Removes overlapping volume of 3D objects from another.

Assign these examples to the correct categories according to their commands.

Groups:

(a) Union

,

(b) Subtract

,

(c) Intersect

• A hollow cube (imagine a box with no top)

• A chair model developed by blending different geometrical shapes

• A pipe system with interconnected sections.

• A sculpture created by merging two solids.

• An architectural model merging several solid structures

• A tool with a grip created by removing material

Organize these options into the right categories

Groups:

(a) The Statue of Liberty

,

(b) George Nelson Clocks

,

(c) Petra, Jordan

• 
• 
• Statue of Liberty unifies multiple components, exemplifying 'union' principle beautifully.

• Mid-century clocks uniquely shape via union and subtraction principles.

• Petra's rock-cut architecture stunningly showcases the subtractive design method.

• 

Type ​ (a)   to use the UNION command.

Type ​ (b)   to use the SUBTRACT command.

Type ​ (c)   to use the INTERSECT command.

• IN
• SUB
• UN
• I
• S
• U

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

• When do I use 'intersect' command?

• Use to retain overlapping regions between objects.

• Why isn't subtraction working?

• Select the object to keep first, press enter, then select the object to remove, enter again.

• Why are my objects connected?

• Subtract' merges; use 'separate' to disconnect.

Name three products designed using subtract or union commands.

Evaluate responses using AI:

OFF

Name three products designed using intersect command.

Evaluate responses using AI:

OFF

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