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2018 AMC 10A Problem 9

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2018 AMC 10A Problem 9AMC 10 Step by Step
Name:                             Date: September 13, 2026
Similar & Congruent Triangles · difficulty 2 of 5 · about 2 min · position P1-10

All of the triangles in the diagram below are similar to isosceles triangle ABCABC , in which AB=ACAB=AC . Each of the 77 smallest triangles has area 1,1, and △ABC\triangle ABC has area 4040 . What is the area of trapezoid DBCEDBCE ?

figure

  1. A)

    1616

  2. B)

    1818

  3. C)

    2020

  4. D)

    2222

  5. E)

    2424

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