International Correspondence Schools · Scranton, International textbook company · leaf 75
Fig. 94. used as a guide for the pen or pencil. It is evident that alllines drawn in this manner will be parallel. Vertical lines are drawn by means of triangles. The trianglesmost generally used are shown in Figs. 95 and 96. Each hasone right angle, marked 90° in the figures. Fig. 95 has two … Flu. 95. Fig. 96. angles of 45° each, and Fig. 96 one of 60° and one of 30°.They are called 4.5° and 60° triangles^ respectively. To draw avertical line, place the T square in position to draw a horizontalline, and lay the triangle against it, so as to form a right angle. §1 ELEMENTS OF LETTERING.…
Lettering · Sign painting
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-302-464.webp)
