Skip to main content

Isometric drawing


When we draw a solid on paper we are making a 2-D representation of a 3-D object.

Here are two pictures of the same cuboid, measuring 4x3x2 units.
cuboid on ordinary squared paper and on isometric paper
The isometric paper has a grid of equilateral triangles instead of square, this isometric view can be obtained by choosing viewing direction in such a way that the angles between the projection of x, y, and z axes are all the same, or 120.

The dimensions of the cuboid cannot be taken from the first picture but they can be taken from the picture drawn on isometric paper. Instead of isometric paper you can also use 'triangular dotty' paper.
triangular dotty paper

Be careful to use it the right way round.

Comments

Popular posts from this blog

Panic or panick

There is only one spelling for panic; the verb is inflected 'panic, panics, panicked, and panicking’. The form panick is used for progressive tense, past tense and past participle. We don't write panick today, though English speakers from a few hundred years ago might have (in the same way they might have written musick).

When the alternate spelling “panick” is used for the past participle: "I panicked last night at the disco." When it’s use for progressive tense: “Invariably, when markets are panicking, they sell the stocks quickly.”

It's the rule for root words ending in "c" is that you have to add “k”, so the spelling is related with the pronunciation. If we don't add the <k>, it looks as if the <c> has to be pronounced /s/. If the "k" was not there, “panicing” would look like the word which is supposed to be pronounced as if it is ended in "sing," while “paniced” would be pronounced like “panised”.

The same would …

PEMDAS

"PEMDAS" - parentheses, exponents, multiplication, division, addition, subtraction, is the "order of operation" in a single math expression.

Petticoats, breeches and Pinafore

One of the milestones that a little boy passed at the age of four or five was the transition from baby clothes or petticoats to trouser or breeches. He would still wear a pinafore to protect his clothes, but he was expected to be able to dress himself and tie the strings of his pinafore in a bow, at the back.