Answer:
Part 1) 
Part 2) 
Part 3) 
Step-by-step explanation:
see the attached figure with letters to better understand the problem
step 1
<em>Find the value of z</em>
In the right triangle DBC
----> equation A
In the right triangle ABC
----> equation B
equate equation A and equation B



step 2
In the right triangle DBC
Applying the Pythagoras Theorem

we have

substitute





step 3
Find the value of x
In the right triangle ABC
Applying the Pythagoras Theorem

we have

substitute




