Two opposite sides of a parallelogram each have a length of #18 #. If one corner of the parallelogram has an angle of #(5 pi)/12 # and the parallelogram's area is #144 #, how long are the other two sides?

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Answer 1 · 2016-08-28T09:24:15

#=7.73#

Area of Parallelogram #=144=ab sintheta# where #a=18# and #b=?# and #theta=(5pi)/12#
or
#144=18timesbtimessin((5pi)/12)#
or

#b=144/18times(0.966)#

or

#b=8times(0.966)#

or

#b=7.73#