Answer
1. Formula: P = 2L + 2 W
Solution:
P = 2 (45cm) + 2 (15cm)
P = 90cm + 30cm
P = 120 cm
2. Formula: P = s + s + s
Solution:
P = 10cm + 15 cm + 17 cm
P = 42 cm
Note: In finding the perimeter you need to add the hiven dimensions of a polygon.
Hope it helps
