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Lesson 3.1 - Perpendicular Postulate

Author:Sam Elias
There exists exactly one perpendicular to a line through a given point.

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  • 이등변삼각형의 꼭짓점에서 밑변에 내린 수선의 발은 밑변의 중점이다.(Foot of Perpendicular at the base of the isosceles triangle is the center of the base.)

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