Question

the parallel sides of trapezium are 20m and 30m and its non parallel sides are 6m and 8m.Find the area of trapezium

Answer 1

a^2+x^2 = 36
b^2+x^2 = 64
b^2-a^2= 28
b+a*b-a = 28 
so 
b+a = 30-20=10
So b-a=2.8 and b+a=10
b=6.4. a=3.6, and x=4.8
3.6*4.8/2+4.8*20+6.4*4.8/2= 120
so area = 120 m per sq