ADVENTURES Of MYRTLE THE TURTLE
The last issue of "GO" contained a story by Chris Gregory,
in which timetravelling Myrtle the Turtle met the Egyptian Goddess Sesheta.
Sesheta asked Myrtle to help build the Pyramids. Myrtle got as far as
drawing a triangle and a square. This issues looks at other activities
using the square and the triangle.
Draw a House Use the Turtle to draw a picture of a house.
This activity encourages the 'top down' approach to problem solving. Logo
was designed to encourage this way of working. It involves breaking down
a complex task into several smaller, simpler tasks. HOUSE is broken down
into the more manageable units of SQUARE and TRI.
This may be more complicated than it seems. The first attempt may result
in the triangle being inside the square. This is not seen as a'wrong'
solution and children are encouraged to approach mistakes with a view
to 'debugging' them.
Possible 'wrong' solutions require debugging.

House windows and doors are extras and require using LOGO variable
factor

Drawing a Picture The HOUSE procedure is only one way of using
SQUARE and TRI. Children should be encouraged to create other pictures
using these and other procedures.
There are several other solutions to the pyramid net problem which
could be explored by the children.

Making a Pyramid Producing a threedimensional object from its
constituent twodimensional shapes has a significant effect on developing
a child's understanding of the link between real objects and geometric
symbology.
Ask the children to work out how many faces there are on a pyramid, and
what shape they are. Draw the shapes for a pyramid on card, using the
Turtle. Cut out the shapes and stick them together with sticky tape to
make a model.
Ask the children to examine their model and work out if they can program
the Turtle to draw a 'net' for the pyramid.
A net is the pattern of shapes created by cutting along the edges of a
solid and laying it out in one piece.
Making a Cube Ask the children to examine a cube. How many
faces does it have? Draw the faces with the Turtle, cut them out
and stick them together with sticky tape to make a cube. Ask the
children to program the Turtle to draw a net for a cube. How many
different ways can they find to do this?

Some of the other solid shapes that can be made by using the procedures
TRI and SQUARE. 
