Mr. Anker Tests:
Linear Measurement
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Measurement
set A with a fixed ruler
Measurement
set 1 (inch, ½ inch, ¼ inch)
Measurement
set 2 ( ½ inch, ¼ inch)
Measurement
set 3 ( ¼ inch, 1/8 inch)
Measurement
set 4 ( 1/8 inch, 1/16 inch)