Exercise your creativity with a quick drawing challenge, set by Emyr Williams. RA Sketch Club tutor Emyr Williams challenges ...

Image caption, This image has one pair of parallel lines and one transversal. The diagonal line is a transversal as it is crossing the pair of parallel lines. When two lines intersect, the ...

Set squares are drawing instruments used to create vertical, horizontal, and diagonal lines as well as certain angles. They may be shaped as squares, Ls, or triangles, although in American usage set ...