Which of the following rational numbers is equal to 2.8 with a bar over the 8? a: 22 over 9 b: 24 over 9 c: 26 over 9 d: 28 over 9

The answer you are looking for is B

It’s obtuse

Explanation:
Assign the sides by length with c being longest
If (a^2)+(b^2)>(c^2) it’s acute

If (a^2)+(b^2)=(c^2) it’s right

And if (a^2)+(b^2)<(c^2) it’s obtuse

Since (3^2)+(9^2)=9+81=90
And 10^2=100 we know that (a^2)+(b^2)<(c^2) so it’s obtuse