Relative polar input: to add a 3-inch segment at 45° from the current endpoint, what exactly should the drafter type using relative polar coordinates?
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Atype @3<45 and enter
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Btype 3 back slash and enter
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Ctype 3 forward slash and enter
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Dtype 3 and try to use the Dynamic Input readout to find the end point
Answer
Correct Answer: type @3<45 and enter
Explanation
Introduction / Context:Relative polar coordinates are the fastest way to create angled segments with exact lengths. Mastering the syntax saves time and improves geometric accuracy, especially in repetitive layouts.
Given Data / Assumptions:
- We are continuing from the current endpoint.
- Desired length is 3.00 units at 45 degrees.
- System uses standard @distance
Concept / Approach:Relative means measured from the last point, and polar syntax uses a distance with an angle. The @ symbol signals relative input, the number is the distance, and the angle follows after the less-than sign.
Step-by-Step Solution:
Start or continue a line/polyline.At the prompt for next point, type @3<45.Press Enter to create the segment.Check Ortho is off (otherwise angle is constrained).Repeat with different distances/angles as needed.Verification / Alternative check:Use the Distance command between the last two points; it should report 3.00 at an angle of 45 degrees relative to the X-axis.
Why Other Options Are Wrong:
- Back slash/forward slash: Not valid polar syntax.
- Typing 3 and relying on Dynamic Input: That controls length but not a precise angle unless set; polar entry is exact.
Common Pitfalls:Forgetting the @ leads to absolute polar, moving from 0,0 instead of the last point. Always include @ for relative moves.
Final Answer:type @3<45 and enter