Answer:
D: 6
Step-by-step explanation:
We know that the triangle is a right triangle
We can halve each of the sides
20/2 = 10
16/2 = 8
Pythagoream Theorem: A^2 + B^2 = C^2
C= 10
A= 8
10^2 - 8^2 = B^2
100 - 64 = 36
B^2 = 36
B = 6