Answer:
uhhhh
Step-by-step explanation:
Sorry I did not know your answer
12
by Pythagoras theorem,
P²+B² =H²
5²+B²=13²
B²= 13²-5²
B²= 169-25
B²= 144
B=√144
B= 12
i will give you the answer
but what do you need
do you need intersect,slope,y=mx+b form?