Lines, Angles, and Triangles

SAT Math· difficulty 4/5

A rectangular box has dimensions 3, 4, and 12. What is the length of its space diagonal?

A
$\sqrt{161}$
B
$13$
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C
$\sqrt{19}$
D
$19$

Explanation

= \\sqrt{3^2 + 4^2 + 12^2} = \\sqrt{9 + 16 + 144} = \\sqrt{169} = 13

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