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Mathematics 9 Online
OpenStudy (anonymous):

Given circle Γ, point A is chosen outside of Γ. Tangents AB and AC to Γ are drawn. K is a point on the circumference of Γ contained within ABC. D is a point on AB and E is a point on AC such that DKE is a straight line and tangent to Γ. If AB=19, what is the perimeter of triangle ADE?

OpenStudy (perl):

can you draw it ? and take off your sunglasses

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