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Lines, Angles, and Triangles

SAT Math· difficulty 5/5

In triangle ABC, AB = AC = 13, and BC = 10. What is the length of the median from A to BC?

  • A

    159\sqrt{159}

  • B

    12

    check_circle
  • C

    144\sqrt{144}

  • D

    169\sqrt{169}

Explanation

The median to the base of an isosceles triangle is also the altitude. Median =sqrt132−52=sqrt144=12= \\sqrt{13^2 - 5^2} = \\sqrt{144} = 12.

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