Marjon Tas Global description of the circle frame The actual frame of the CircleFrame has similar dimensions as the TactiPad (28 cm by 37 cm). The thickness of the frame is four millimetres. Near the outer edge of the frame oval holes can be found to place the frame in one of three positions on the TactiPad. For an a-centric position, two additional holes are present at both sides near the circle. To description sectionTo manual section …
Global description The size of the zigzag triangle is such so that it fits exactly inside the 20 centimetres diameter of the circle.The three sides of the body of the triangle all have a different pattern. The middle section of the triangle is open. The inner sides have the same patterns at a smaller scale as along the outside. The zigzag triangle is also called a ‘Christmas tree’. To description sectionTo manual section Detailed description …
Global description The 468triangle is an open triangular shaped frame with a width of one centimetre. The number 468 refers to the steps required for the triangle to return on the exact same position in the circle; four, six or eight steps respectively. Beyond this it serves as a template for ‘home made’ templates. To description sectionTo manual section Detailed description The corners of the triangle are pointy so they fit in the indents at …
Detailed description The wedge-shaped drawing tool has a rounded edge that matches the curve of the circle in the CircleFrame. This rounded side covers an arc of 45 degrees. Near the rounded edge grooves per six degrees (one minute) are located. A little further away from the edge a hole is present. Two sides of this tool end in a flattened point. One of these sides is straight and ends in a very small point …
Rubber bands spanning the diameter Indentations are placed around the outside of the circle frame in which rubber bands can be attached. These indentations are positioned at every 10 degrees seen from the centre of the circle. Slightly wider indents make the positions for 0, 30, 45, 60, 90 degrees, etc. easily recognizable. When spanning to opposing indentations with a rubber band, they meet the centre, forming also the diameter of the circle.It also exactly …
The GraphGrid frame Detailed description The GraphGrid frame is yellow with a thickness of four milimetres. It is placed on the TactiPad like a picture frame. Eight oval holes in the frame fit around the knobs of the TactiPad to hold it in place. Three of the four corners are rounded. Along the inner edge, small curved hooks are placed at a regular interval of 1 centimeter. Along the outer edge of the GraphGrid, indentations …
Hyperbole; tool to draw y=1/X Global description The global shape of the tool is a rectangle hook with the curved contour at the inner side. Pushpin markers are provided at the top surface. A small square for alignment is left out at the lower left corner of the tool. By nature of the formula, the tails of the tool become very thin. To maintain the sturdiness of the tool, additional material has been added. the …
Lens; tool for convex and concave lens or mirror Global description The symmetrical tool could be described as a traditional house where the top part is curved. The first floor is one big window where to top side is curved. The second floor has a window where the top and bottom sides are curved in opposite directions. The shape of all curves represent the curves of the lenses. In the top and bottom sides of …
Parabola; X to the power of 2 Detailed description The inner space of this U-shaped tool has the contour of the formula X to the power of two. The two poles of the U have indented centimetre indications along the outside. Three medium size alignment indents are provided near the bottom; one in the middle and one in each of the two poles. Pushpin markers are provided in the top surface of the tool. The …
SinTang; combination tool for the sine, cosine and tangent graph Global description The SinTang tool combines graphs for two formulas; the sin(X) and the tan(X). More precise, a half period of the sine graph and a quarter of the tangent graph. The sine graph, is the ‘hill’ contour which is the first half period of the sine graph. The cosine is a to the left shifted sine graph. When placing the tool looking at the …