ARTS AND CRAFTS 27-04-2020

TECHNICAL DRAWING

ART and GEOMETRY

TARTESSIAN STAR

You are learning how to create the geometrical patterns of the Mudejar Art.

At our previous lesson you learnt how to draw a perpendicular bisector (mediatriz) of a segment.

Today we are going to use this technique to draw a square inscribed inside a circumference (Cuadrado inscrito en una circunferencia)                                  

And then, based on this technique you are going to create a Tartessian star. ➜

The Tartessian star is an eight-pointed star, and it is the result of the superposition of two concentric squares, where one of them has been rotated 45 degrees.

You will need: a compass, a pencil, a rubber, a ruler, a pencil sharpener and  a piece of paper.

1.To start with, watch this video and then follow the steps to construct a square inscribed in a circumference.

- Step 1: Define the centre of the circumference.

- Step 2: Use your compass and draw a circumference of a radius of 4 cm.

- Step 3: Use your ruler and draw the diameter AC through the centre of the circumference.

- Step 4: Use a compass and bisect the diameter of the circle. Now you have two perpendicular diameters.

- Step 5: Join the ends of the  diameters to make a square. And now you’ve got a square inscribed inside a circumference.
It's not rocket science, isn't it?

Now it's time to create a Tartessian star.

To do it you have to draw another square inside the circumference.
1. Use your compass and bisect the side 
 AB of the 1st square.
2. Use your ruler and trace a diameter that divides the side AB in two equal parts.
2. Now draw the bisector of BC side and trace another diameter.
3. Join the the ends of these two diameters to make a second square.
4. You've just made an eight-pointed star.
5. Imagine that it's a tile (azulejo) and you have to decorate it for Alhambra palace. Switch on your imagination!

TAKE PICTURES OF YOUR WORK OF ART AND EMAIL IT TO ME.

THE DEADLINE (FECHA LÍMITE) FOR THIS WORK IS 1st MAY (01-05-2020)