Please answer this question 

Asked by Girishdhawan | 25th Jun, 2018, 09:07: PM

Expert Answer:

 
AB = 20 m = CD
BC = AD = 21 m
AC = 23 m
CD + DE = CE
20 + DE = 42
DE = 22 m
Find area of triangle ADE using Heron's formula.
begin mathsize 16px style Area space of space triangle space equals space 1 half cross times 22 cross times straight h
find space height space of space the space triangle space which space equals space to space the space distance space between space the space parallel space sides.
Now space you space can space find space the space area space of space trapezium space using space formula. end style

Answered by Sneha shidid | 29th Jun, 2018, 10:22: AM