Question

Trapezium given below; find its area.

Answer 1

Area of ΔEBC = `1/4 xx 8 xx sqrt( 4 xx 10^2 - 8^2 )`

= `1/4 xx 8 xx 18.3`
= 36.6 cm²

Again
Area of ΔEBC = `1/2` x 8 x h

              36.6 = 4h
                  h = 9.15

Area of ABCD = `1/2 xx ( 12 + 20 ) xx 9.15`

                       = `1/2` x 32 x 9.15

                       = 146.64 sq.cm