Answer:
Obtuse
Explanation:
square the 2 smaller side lengths. 10^2+11^2= 221. If you square the longer side length, you get 225. 15^=225.
An acute triangle is when the 2 smaller side lengths are greater
A right triangle is when the 2 smaller side lengths are equal
An obtuse triangle is when the 2 smaller side lengths are less.
221 is less than 225, making it obtuse.