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Instruments used in mathematics and geometry

compasses

noun

a piece of equipment used for drawing circles, consisting of two thin parts joined in the shape of the letter V

dividers

noun

a piece of equipment used for measuring or drawing lines and angles, consisting of two pieces of metal with pointed ends that are joined together at the top

plumb line

noun

a piece of string with a metal object fixed to the bottom, used for checking whether a wall is straight or for measuring the depth of water

protractor

noun

an object that is shaped like half a circle and is used for measuring and drawing angles

ruler

noun

an object used for measuring or for drawing straight lines, consisting of a long flat piece of plastic, wood, or metal marked with units of measurement

set square

noun

a flat plastic or metal tool with three straight sides and one right angle, used for drawing lines and measuring angles

slide rule

noun

a simple piece of equipment like a ruler with a piece in the middle that slides along, used for calculating

theodolite

noun

a piece of equipment that a surveyor uses for measuring angles

triangle

noun

a set square

T-square

noun

a tool in the shape of the letter T that can help you to draw lines that are exactly parallel or in the shape of a square. A T-square is used in making detailed plans for buildings etc.

emoji

a small digital image … which is used in electronic communication to express emotion or other simple concepts

BuzzWord Article

Open Dictionary

major on (doing) sth

to have or do a lot of something; to focus on a particular thing

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