1.
a) 1 działka : 4 × 17,5 m = 70m
2 działka : 2 ×(15,1m + 19,9m) = 70m
b) P1 = 17,5m × 17,5m = 306,25m²
P2 = 15,1m × 19,9m =
306,25m² - 300.49m² = 5, 79m²
2. a = 26,2 dm : 4
a = 262 cm : 4
a = 65,5 cm
3. x - liczba
x + x + 7,5 = 25
2x = 25 - 7,5
2x = 17,5 / :2
x = 8, 75