These unusual structures - with their intricate designs and symmetrical forms - may look like they have been created by a 3D printer, but they are in fact more than a century old. Displayed at the ...

A straight line drawn on a grid can be described by a rule connecting the x and y coordinates of every point on the line. This is known as the equation of the line. The equation of any straight line ...

Now use the information you already have about finding the equation of a line and apply it to the dashed lines shown in these triangles. Remember, to find the equation of a line you need a point ...