Generating a triangle with SVG In SVG a polygon can be specified using the polygon tag with the attribute points listing the coordinates of the vertices. This could be included in a webpage with a suitable question (“If a right-angled triangle has an angle 38° what is the value of the remaining angle (a)?” say) and answer mechanism. In this case the question and answer mechanism is unrelated to the graphic which is really just an illustration. Of course a similar effect could be produced with much less effort by simply having a static image of a triangle whose angles are labelled with θ and a and telling the user that angle θ is 38o. However it is believed that there is an advantage in ensuring that the angle θ actually looks like it is 38o. For example if the triangle in Fig 2 was so marked and a student was told angle θ is 70o and their calculations told them angle a was not 20o it might be useful if the angle a looked as though it were 20o so that an error in calculation would (should) be more obvious to the student.
