Question

A field in form of a parallelogram two sides 6 m and 40 m and its diagonal is 8 m long find the area of parallelogram​

Answer 1

Area of parallelogram =2 times area of triangle with sides 60,40,80

Let a =60, b=40, c =80

s=60+40+80=180

s= 2/180=90

s=90°

s-a =90°—60=30

s-b =90°—40=50

s-c =90°—80=10

area of triangle =s(s-a) (s-b) (s-c)

90×30×50×10

100(3×3×3×5)

300√15

so area of parallelogram

600√15