Meaning & use
protractor
A flat, usually semicircular instrument marked in degrees, used for measuring or drawing angles.
See it in a sentence
She used a protractor to measure the exact angle of each triangle in her homework.
The carpenter checked the corner's angle with a protractor before cutting the wood.
A note on using this word
Protractor is a basic geometry tool; do not confuse it with a compass, which is used for drawing circles and arcs.
Words with a similar meaning
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