Odpowiedzi

2009-12-02T16:32:56+01:00
1,3 dm =13 cm

2*13cm =26cm

36cm - 26cm = 10cm

p=1/2*a*h
P=1/2*10cm*12cm
P=5cm*12cm
P=60cm²
2009-12-02T16:36:56+01:00
1,3 dm = 13 cm
13 * 2 = 26
a = 36 - 26 = 10
h = 12 cm
P = ?
P = 1/2 * a * h
P = 1/2 * 10cm * 12 cm
P = 5 cm * 12 cm
P = 60 cm²