alleryStart learning →Who is named as the founder of geometry, credited with measuring the Great Pyramid of Giza by its shadow?
AThales of Miletus
BEuclid of Alexandria
CPtolemy of Alexandria
DPythagoras of Samos
Answer & Solution
Correct answer: A. Thales of Miletus
1. Thales of Miletus is named as the founder of geometry.
2. The legend holds that he found the height of the Great Pyramid of Giza using the theory of similar triangles.
3. He developed that theory by measuring the shadow of his staff.
4. The same proportional reasoning still underlies angle of elevation and angle of depression problems.
_Source: OpenStax Algebra and Trigonometry (CC BY 4.0), Ch 9 "Trigonometric Identities and Equations", section 9.5 Solving Trigonometric Equations_
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