Tessellate S.T.E.M.S. (2019) - Mathematics - Category A (School) - Set 2 - Objective Problem 1

Level 2

Circles ω 1 \omega_1 and ω 2 \omega_2 intersect at points X X and Y Y . Line \ell is tangent to ω 1 \omega_1 and ω 2 \omega_2 at A A and B B , respectively, with line A B AB closer to point X X than to Y Y . Circle ω \omega passes through A A and B B intersecting ω 1 \omega_1 again at D A D \neq A and intersecting ω 2 \omega_2 again at C B C \neq B . The three points C C , Y Y , D D are collinear, X C = 67 XC = 67 , X Y = 47 XY = 47 , and X D = 37 XD = 37 . Find A B 2 AB^2 .


This problem is a part of Tessellate S.T.E.M.S. (2019)

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