Respuesta :

Answer:


sqrt(20)

Step-by-step explanation:


you can use of Pythagorean theorem.

4-1 = 2 ( = x)

5-1 = 4 ( = y)

a^2 + b^2 = C ^2

2^2 + 4^2 = 4 + 16 = 20


akephd
The answer is 5.
D=sq root of (x1-x2)^2+(y1-y2)^2 so
D=sq root of (4-1)^2+(5-1)^2 so
D= sq root of 3^2+4^2 so
D= sq root of 9+16=25 so
D=5