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# 1º TECHNO UNIT 3 s1

### Graphic expression and communication

WordDefinition
Ruler Measuring tool with markings that show centimetres and millimetres
Protractor Measuring tool, usually a semicircle with markings to show degrees from 0º to 180º
Set squares Triangular drawing tools for drawing parallel and perpendicular lines
Compass Drawing tool with two connected arms, used to draw circles, arcs and to copy segments
Lead Part of a pencil that makes a mark
Formats Different sizes of papers
Vertex The point where the two lines of an angle meet
Hypotenuse The bigger side of a right triangle
Isosceles Triangle with two equal sides
Scalene Triangle with no equal sides
Parallel lines Lines with the same distance continuously between them
Perpendicular lines Lines at 90º to each other
Concentric circumferences Two circumferences that have the same center
Secant circumferences Two circumferences that have two points in common
Scketch A free hand drawing of the mental image that we have of an object, without measurements
Diagram A free hand drawing of the mental image that we have of an object, detailed and with measurements
Created by: amediavilla
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