Answer:
not a right triangle
Step-by-step explanation:
We can use the Pythagorean theorem to see if it is a right triangle
a^2 + b^2 = c^2
15^2 + 12^2 = 21^2
225 + 144 = 441
369 = 441
This is not true so it is not a right triangle
Answer:
A
Step-by-step explanation:
I’m not 100% sure but i think ur answer rn is correct don’t check the second box
3/4 + 1/12 = 10/12 and then you simplify it and get 5/6 as your final answer.