Answer:
you're right for both!
Step-by-step explanation:
hey there :)
for question 12 you are right
we could use pythagorean theorem to ensure the side lengths are for a right triangle
the theorem states that a^2+b^2=c^2
all of the values you selected are pythagorean triples and work.
for 13 you are also right
you plug 3 and 4 into the pythagorean theorem
3^2+4^2=x^2
9+16=x^2
25=x^2
x=5
so you are correct.
