(i) Measurement of AD.
We can see that AD is a side in a right triangle with the other sides 41 and 40. Hypotenuse is not AD. Use Pythagorean Theorem.
(ii)Area of Quadrilateral ABCD.
We can see AD is the height. The bases are 15 and 40. Follow formula:Ans: AD=9cm A=247.5cm