Perpendicular lines are drawn by fitting the hypothenuse of the triangle to the T-square at an angle, or another triangle. Then, turn the triangle so that the hypothenuse is perpendicular to the line.
Constructing perpendicular lines
Drawing Perpendicular Lines Using Square Triangle Hypothenuse
Keyword: T-square
Drawing Perpendicular Lines Using T To Square and Triangle Other
Perpendicular Sides, Shapes & Line Segments - Lesson
turn a triangle into a square
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Free Perpendicular Cliparts, Download Free Perpendicular Cliparts
T Triangle Logo Symbol Royalty Free Vector Image, 58% OFF
Drawing a line perpendicular to a randomly oriented plane