please help using the pythagorean theorem !!!!!

Answer:
13
Step-by-step explanation:
h^2=5^2+12^2
h^2=25+144
h^2=169
h=sqr169
h=13
Answer:
13
Step-by-step explanation:
by Pythagorean theorem a²+b²=c²
a=5, b=12, c=AC
5²+12²= 25+144
=169
c²=169
c=✓169
=± 13 ( but length could only be positive)
AC=13