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2017 AMC 10A Problem 23

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2017 AMC 10A Problem 23AMC 10 Step by Step
Name:                             Date: September 13, 2026
Basic Counting · difficulty 4 of 5 · about 8 min · position P21-25

How many triangles with positive area have all their vertices at points (i,j)(i,j) in the coordinate plane, where ii and jj are integers between 11 and 55 , inclusive?

  1. A)

    21282128

  2. B)

    21482148

  3. C)

    21602160

  4. D)

    22002200

  5. E)

    23002300

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