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Earn +20 ptsQ: Who first used the symbol for perpendicular?
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Who first used the symbol for parallel?
William first used the symbol for parallel.
Who first used the symbol of pi?
William Jones first used the pi symbol (π) in 1706
What does an upside-down T mean?
It is the symbol for 'perpendicular'.
What is the symbol for two lines being perpendicular?
An inverted capital T
How do you label perpendicular lines?
perpendicular lines form a right angle at their intersection so draw the right angle symbol at the intersection
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