a set square; a triangle

figure, diagram / graph / (geometry, mathematics) figure

to use / to employ / to make use of, to apply / to spend

straightedge (instrument for drawing lines)

to paint; to draw / to picture; to portray; to depict / to imagine

to paint; to draw / to picture; to portray; to depict

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

(geometry) triangle