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