Find the length of the right triangle's other leg. Round to the nearest tenth. I don't know how to figure this out?

Question

LEG=9ft
HYPOTENUSE=12ft

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Answer 1 · 2018-01-22T15:46:00

#7.9#

for any right angled triangle we can use Pythagoras' theorem

#a^2+b^2=c^2#

#c="the hypotenuse"#

we have

12^2=a^2+9^2#

#144=a^2+81#

#144-81=a^2#

#a=sqrt63=7.937253933...#

#a=7.9#(nearest tenth)