Answer:
Step-by-step explanation:
3.applying pythagoras theorem
OP=√(12²+9²)=√(144+81)=√225=15
12+x=15
x=15-12=3
4.
AB=24
1/2 AB=12
DA=DC=13
x=√(13²-12²)=√(169-144)=√25=5
