Two sides of a parallelogram are 30 and 20. One diagonal has a length of 40. What is the length of the other diagonal?
+37159 The sum of the squares of the diagonal = sum of sides squared
40^2 +d^2 = 30^2 + 30^2 + 20^2 + 20^2
d^2 = 1000
d = sqrt (1000) simplify as needed ...... ~EP
