SOLUTION: In rectangle ABCD, line AD is 8 units long. What is the length of line AB in units? Figure: https://i.imgur.com/uuCA2hc.png

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Question 1139343: In rectangle ABCD, line AD is 8 units long. What is the length of line AB in units?

Figure: https://i.imgur.com/uuCA2hc.png
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
AD is a leg and AB is other leg of special right 30-60-90 right triangle.

AC is 16 units.

AB%5E2%2B8%5E2=16%5E2
AB%5E2=16%5E2-8%5E2

AB%5E2=192
AB%5E2=4%2A48=4%2A4%2A12=4%2A4%2A4%2A3
highlight%28AB=6%2Asqrt%283%29%29

Answer by ikleyn(52772) About Me  (Show Source):
You can put this solution on YOUR website!
.

The correct answer is AB =   8%2Asqrt%283%29.