Find the height of the trapezium in which parallel sides are 25 cm and 10 cm

Find the height of the trapezium in which parallel sides are 25 cm and 10 cm and non-parallel sides are 14 cm and 13 cm.

image
Draw AE||BC, through A.
Draw AF⊥CD
For ∆ ADE,
s = 21 cm,
Area of ∆
ADE=image
=image
= 84 cm2
1/2 ×height = 84 cm2
Height =image = 11.2 cm