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AMC 10 Mock Exam Discussion For 9/6: Question 7

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AMC 10 Mock Exam Discussion For 9/6: Question 7
by John Lensmire - Wednesday, September 6, 2023, 2:43 PM

AMC 10 Mock Exam Question 7

The $8\times18$ rectangle $ABCD$ is cut into two congruent hexagons, as shown, in such a way that the two hexagons can be repositioned without overlap to form a square.

What is $y$?

$\mathbf{(A) } 6\qquad\mathbf{(B) } 7\qquad\mathbf{(C) } 8\qquad\mathbf{(D) } 9\qquad\mathbf{(E) } 10$

Submit your answer and solution and explanation below! Solutions will be accepted for 48 hours until 9/8 at 2pm Pacific Time. (There's still time for yesterday's problem too: click here.)

Top solutions for all the Mock Exam questions will be collected and shared as part of a full 25 Question Mock AMC 10 Exam.

Note: The question above is a past AMC problem. Solutions submitted must be written by students. Copied solutions will be disqualified.