The dashes on the lines show they are equal ... b + c = 180^\circ\), firstly draw a line parallel to one side of the triangle. \(d = b\) (alternate angles are equal) \(e = c\) (alternate angles ...

The dashes on the lines show they are equal ... b + c = 180^\circ\), firstly draw a line parallel to one side of the triangle. \(d = b\) (alternate angles are equal) \(e = c\) (alternate angles ...

If the triangles are congruent and each ... are intersected by a third straight line. With both parallel lines cut, the adjacent angles and corresponding sides will share the same shape created ...

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 ...