Answer:
b < a < c
Explanation:
given the 3 lengths of the sides of a triangle
• the smallest angle is opposite the shortest side
• the largest angle is opposite the longest side
the shortest side is 6, then ∠ b is the smallest
the longest side is 13 , then ∠ c is the largest
the side of 10 , means ∠ a , is between ∠ b and ∠ c
the angle measures in increasing order are then
b < a < c