Answer:
b is 6
Step-by-step explanation:
If you flip the smaller side of the triangle over the biggest side the length 3 will be half of the bottom left side of the length b so just multiply 3 by 2
B=[tex]\sqrt{45}[/tex]
45 is your answer
use Pythagorean Theorem
A²+B²=C²
A and B are the two sides next to the 90 degree angle
C is the diagonal or the side across from the angle
A=6
C=9
6²+B²=9²
B²=45
