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Which Boolean operation sequence should you use?

hard📝 Scenario Q15 of 15
Figma - Shape Tools and Drawing

You have three overlapping shapes: A, B, and C. You want to create a new shape that includes all areas covered by A and B but excludes any area where C overlaps. Which Boolean operation sequence should you use?

AIntersect A and B, then Exclude C
BSubtract C from A, then Union with B
CUnion A and B, then Subtract C
DExclude C from A, then Intersect with B
Step-by-Step Solution
Solution:
  1. Step 1: Combine A and B fully

    Use Union to merge A and B into one shape covering all their areas.
  2. Step 2: Remove overlap with C

    Use Subtract to cut out any area where C overlaps from the combined shape.
  3. Final Answer:

    Union A and B, then Subtract C -> Option C
  4. Quick Check:

    Union then Subtract excludes C overlap [OK]
Quick Trick: Union first, then subtract to exclude overlap [OK]
Common Mistakes:
MISTAKES
  • Using Intersect instead of Union first
  • Excluding before combining shapes
  • Mixing order of operations

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