Question

If A = (7,9) and B = (3, 12), what is the length of AB?
A. 4 units

B. 5 units

c. 7 units

D. 6 units

Answer 1

Answer:

B. 5 units

Step-by-step explanation:

$\tt |AB|=\sqrt{(3-7)^2+(12-9)^2}=\sqrt{16+9}=\sqrt{25}=5 \ \ units$