Multiple choice

Which instrument is used for measuring the lengths of arbitrary curved lines (such as those in a map)?

  1. Maptometer

  2. Opisometer

  3. Atlasto

  4. Isometer

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An opisometer is a specialized measuring instrument with a small wheel that traces curved lines on maps, converting the distance traveled by the wheel into linear measurements. This tool is essential for accurately measuring irregular paths like rivers, roads, or borders that cannot be measured with a straight ruler. The other options are either made-up terms or incorrect instruments for this purpose.

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