Protractor
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A protractor to measure angles and degrees.
Galleries
ProtractorsSource
Franklin S. Hoyt and Harriet E. Peet Everyday Arithmetic (New York: Houghton Mifflin, 1920) 98
Downloads
2400×1527, 555.4 KiB
1024×651, 94.9 KiB
640×407, 51.2 KiB
320×203, 18.7 KiB