Answer
The locus is the circle $f$ in the picture.
![](https://gradesaver.s3.amazonaws.com/uploads/solution/db6eb422-bed0-4d53-b672-129fd82511a9/result_image/1502292076.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAJVAXHCSURVZEX5QQ%2F20240908%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240908T001511Z&X-Amz-Expires=900&X-Amz-SignedHeaders=host&X-Amz-Signature=441b287cd57958a284882aba5ae61d98b14d1dce8e208a2147dd7e9db867e6de)
Work Step by Step
For any point X on the circle, BX = 1 in.
For any point X, that BX = 1 in. point X is on the circle.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.