Wednesday, 29 June 2016

Reviewing Basic Constructions for your Visual Arts exam

A review for the exam (with videos in Spanish)
Don't just watch the videos. Do it yourself using your set squares and compass!

Dividing a line segment into equal parts:

Symmetry of a shape:

Line segments operation (adding up and subtracting):

Perpendicular bisector:

Move or copy an angle:

Angles operation (adding up):

Angles operation (subtracting):

Angle bisector:

Square given a side

Square inscribed in a circumference

Equilateral triangle inscribed in a circumference (given the radius of the circumference)

Equilateral triangle given the side

Circumference through 3 points

Monday, 27 June 2016

Parallel and Perpendicular lines, again!

Take a look to this presentation to review how to create parallel and perpendicular lines, and do the task.

Saturday, 18 June 2016

The Circumference

Angle Bisector

To bisect an angle means that we divide the angle into two equal parts without actually measuring the angle. Each point of an angle bisector is equidistant from the sides  of the angle.
  1. Draw an angle.
  2. Center the compass at vertex of the given angle and draw an arc intersecting both sides of it. We get 1 and 2
  3. Center the compass at point 1 and draw an arc.
  4. With the same measure center it at point 2 and draw another arc.
  5. Where these arcs cross we get point 3.
  6. If we join point 3 with the vertex of the angle we get the angle bisector.
How to bisect an angle with compass and straightedge or ruler animation.

Bisect an angle