4 years ago

PLEASE SOMEONE HELP ME ASAP!!!!!!!

1 answer:

6 0

Look at the picture.
Use the Pythagorean theorem:
$|DF|^2+11^2=(11\sqrt3)^2\\\\|DF|^2+121=121\cdot3\\\\|DF|^2+121=363\ \ \ |-121\\\\|DF|^2=242\to|DF|=\sqrt{242}\\\\|DF|\approx15.6\ inches.$

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