Humans have been using it for a variety of tasks for centuries, taking advantage of its properties for things like writing on blackboards etc.
chalk
Explain the word: college
.
An object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline.
set square
A tool used to measure angles.
protractor
Used to mask errors in text. Once dried, it can be handwritten or typed upon. It is typically packaged in small bottles.
correction fluid
Explain the word: bookcase
.
An item which is used to erease board.
duster/ereaser
Explain the word: pointer
.
A hanging thing you put the things on.
shelf
A high school for technical education.
polytechnic
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