Question

height 16cm parallel side 15cm parallel side b ? area 360 sq cm​

Answer 1

1/2{a+b}h = area of trapezium where a and b are parallel sides

therefore here,

let the other parallel side be x.

so,

1/2( 15 + x ) 16 = 360 cm^2

15 + x = 360 / 8

therefore,

x = 45-15

x = 30 cm

Answer 2

Therefore x = 45-15=30