In parallelogram ABCD, AB=125cm, AD=132cm, and the length of diagonal AC is 37cm. The area of the parallelogram, in cm2, is
[ABCD] = 4620 cm2
It's very simple.
Two identical triangles with side lengths of 125 cm, 132 cm, and 37 cm form a parallelogram ABCD.
Heron's formula gives the area of a triangle when the length of all three sides is known.
A = sqrt[s(s - a)(s - b)(s - c)] ( s => semiperimeter ) s = 1/2(a + b + c)