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The scale used to find angles is ________

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The scale used to find angles is ________

(a) Diagonal scale

(b) Comparative scale

(c) Circular vernier scale

(d) Scale of chords

I have been asked this question in an internship interview.

My question is based upon Types of Scales in chapter Scales of Engineering Drawing

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Right option is (d) Scale of chords

The best explanation: The scale of chords is used to set out or measure angles when a protractor is not available. It is based on lengths of chords of different angles measured on the same arc.

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