Answer:
8, 26 and 19
Explanation:
Perimeter is the length of all sides of a polygon. It is simply the length of the boundary around a closed shape. Perimeter of a triangle = Sum of all three sides.
Hence,
n + 3n + 2 + 4n - 13 = 69 (acc. to Q)
n + 3n + 4n + 2 - 13 = 69
8n - 11 = 69
8n = 80
n = 80/10
n = 8
Length of all three sides:
- n = 8
- 3n + 2 = 3(8) + 2 = 26
- 4n - 13 = 4(8) - 13 = 19