ashleymnoon19owbvfv ashleymnoon19owbvfv

22-01-2018
Mathematics

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tynollette tynollette

22-01-2018

the tangent line is perpendicular to the radius from the center of the circle to the point of tangency.
ΔDCE is similar to ΔDBA
DC/DB=DE/DA
15/50=DE/40
DE=12

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