Answer:
not a right triangle
Explanation:
using Pythagoras' identity
if the square of the longest side is equal to the sum of the squares of the other 2 sides then the triangle is right.
longest side is 38 , then 38² = 1444
12² + 35² = 144 + 1225 = 1369
since 1369 ≠ 1444 then sides do not form a right triangle