FIRST TANGENCY PRINCEPLE

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Solució

FIRST TANGENCY PRINCIPLE

A single tangent line passes through any point

on a circumference that is perpendicular to the radius

defined by the centre and that point.




REMEMBER: How to draw a perpendicular line

to a given one, that passes through a point

BY USING SET SQUARES.

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C

T1

t1

r1

r2

T2

t2