A parallelogram ABCD has lengths of sides and angles given below. Find the length of the diagonals AC and BD. (Round your answers to two decimal places.)

AB = DC = 6 and AD = BC = 5, angleA = 40°

2 answers

See 4-13-11, 12:32am post for solution.
c squared= a squared + b squared
c squared= 5 squared + 6 squared
c squared= 25 + 36
c = square root of 61
c = 7.81