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An illustration of the Cathedral at Pisa located in Pisa, Italy. In the distance on the right side the Leaning Tower of Pisa is noticeable.

Cathedral at Pisa (exterior)

An illustration of the Cathedral at Pisa located in Pisa, Italy. In the distance on the right side the…

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to form a right triangle.

Leaning Tower

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to…