The width and height of the rectangle become \(a\) and \(b\) in the formula and \(c\) is the diagonal length. Taking the triangle DEG, Pythagoras’ theorem can be used to calculate the length of EG.

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 ...

Image caption, ...and draw another diagonal line to join the points and mark the angles inside the triangle. Use the scissors to cut the triangle out. STEP 4: Place two of the triangles along the ...

Great choice! Your building is stable enough to take on the Windy City! Diagonals turn rectangles into triangles, and triangles are one of the strongest shapes used in construction today.