1.

The vertices of a triangle ABC are (2, 3), (4, 7), (-5, 2). The length of the altitude through A is:

A. \(\dfrac{9}{53}\sqrt{53}\)
B. \(\dfrac{13}{53}\sqrt{106}\)
C. \(\dfrac{9}{53}\sqrt{106}\)
D. \(\dfrac{13}{53}\sqrt{53}\)
Answer» C. \(\dfrac{9}{53}\sqrt{106}\)


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