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Uso de escuadra y cartabón, paralelas y perpendiculares
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Uso de escuadra y cartabón, paralelas y perpendiculares

Introduction to the Use of Square and T-Square for Parallel and Perpendicular Lines

This section introduces the use of a square and a T-square for drawing parallel and perpendicular lines.

Understanding the Square and T-Square

  • The square has two equal angles of 45 degrees and one angle of 90 degrees.
  • The T-square is another triangle with angles of 60, 30, and 90 degrees.
  • These tools can be combined to draw parallel and perpendicular lines.

Drawing Parallel Lines with the Square

  • By sliding the square along the T-square, we can draw parallel lines.
  • Using different sides of the square allows us to draw perpendicular lines to the previously drawn parallels.

Proper Placement of Tools

  • One tool should remain fixed while the other is moved along its hypotenuse.
  • Generally, the T-square remains fixed while sliding the square.

Practice Exercise - Drawing Horizontal and Vertical Lines

In this exercise, we will practice drawing horizontal and vertical lines using squares and T-squares.

Steps for Drawing Horizontal and Vertical Lines

  1. Define an intersection point between both types of lines.
  1. Start by drawing horizontal parallels.
  1. Change the position of the square to align with a reference line from previously drawn horizontals.
  1. Slide the square along its hypotenuse to mark points for drawing vertical parallels.

Exercise - Drawing Lines at 45 Degrees with Squares

In this exercise, we will draw a series of horizontal and vertical lines that intersect at points formed by lines at a 45-degree angle with respect to horizontal lines. This exercise helps practice using squares for parallel and perpendicular line drawings.

Steps for Drawing Lines at 45 Degrees

  • Draw lines at a 45-degree angle with the horizontal as reference.
  • Use these lines to determine the points of intersection between horizontal and vertical lines.
  • Pay attention to the proper placement of tools for accurate drawings.

Conclusion

The video concludes with some background music.

Additional Music

More Music

Final Music

Video description

En el video se describen estos útiles de dibujo técnico y muestra cómo se trabaja para obtener rectas paralelas con distinta separación, también el dibujo de perpendiculares en cualquier posición. Tiene ejemplos y consejos prácticos para un uso correcto. Recomiendo este tutorial a los estudiantes de los primeros cursos de secundaria.