Lines, Angles, and Triangles

SAT Math· difficulty 3/5

A rhombus has side 1010 and one diagonal 1212. What is the length of the other diagonal?

  • A

    1616

    check_circle
  • B

    2020

  • C

    88

  • D

    1010

Explanation

Diagonals bisect each other perpendicularly. Half of unknown diagonal =10036=8=\sqrt{100-36}=8, so full diagonal =16=16.

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