Answer:
expression of perimeter for figure 16. = 45x+7.5)
expression of perimeter for figure 17. = 11x -6
Step-by-step explanation:
DEFINITION : perimeter : sum of all the sides of a polygon is called perimeter of that polygon.
- 16. the given triangle is an equilateral triangle (can be understood by seeing figure)
- so, all the sides of it will be equal.
- so perimeter of this figure = 15x+2.5 + 15x+2.5 + 15x+2.5
by adding all, we get perimeter = 45x+7.5
- 17. perimeter of this figure = sum of all the sides = 3x-1 + 3x-8 + 3x-1 +2x+4
by adding all, we get perimeter = 11x -6
