Two opposite sides of a parallelogram each have a length of #10 #. If one corner of the parallelogram has an angle of #( pi)/3 # and the parallelogram's area is #80 #, how long are the other two sides?

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Answer 1 · 2016-08-28T13:40:59

#=6.93#

Area of Parallelogram #=80=ab sintheta# where #a=10# and #b=?# and #theta=(pi)/3#
or
#80=10timesbtimessin((pi)/3)#
or

#b=80/10times(0.866)#

or

#b=8times(0.866)#

or

#b=6.93#