Question

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What are orthogonal lines?
a.
any lines on the floor of a painting
b.
imaginary lines that lead to the vanishing point
c.
lines that artists use to create a symmetrical piece
d.
none of the above

Answer 1

b. Imaginary lines that lead to the vanishing point — in linear perspective, orthogonals are the receding lines that converge at the vanishing point to create depth.