Is this triangle a right triangle?

a. yes, because 5^2+12^2=13^2

b. no, because 5^2+12^2=13^2

c. no, because 5^2+12^2≠13^2

d. yes, because 5^2+13^2=12^2

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4

no because after the troops were pulled many blacks were killed by hangings lynchings and other cruel ways which in a way interrupted the reconstruction of the south and differed from the way abraham lincoln had an idea of reconstruction