Answer:
the triangle is not right angled traingle
Explanation:
For a right angle triangle 
 +
 + 
 =
 = 
 where a is the base , b is the height and c is the hypotenuse
 where a is the base , b is the height and c is the hypotenuse 
taking a= 6 b = 14 and c = 15 
hence 
 +
 +
 =
 = 
 
 
 36+196 = 232 which is not equal to 225 
therefore the triangle is not right angled traingle