Odpowiedzi

2010-04-07T17:05:19+02:00

P = (a+b)h/2
d1 = 10 cm
h = 8 cm
a,b - podstawy
c = ramię
z = a-b
h = z czyli z = 8

z tw. Pitagorasa:
b²+8² = 10²
b² = 100-64
b² = 36
b = √36
b = 6 cm

a = z+b
a = 8+6 = 14 cm

P = (14+6)*8/2
P = 20*8/2
P = 160/2
P = 80 cm²
2010-04-07T18:01:31+02:00
P = (a+b)h/2
d1 = 10 cm
h = 8 cm
a,b - podstawy
c = ramię
z = a-b
h = z czyli z = 8

z tw. Pitagorasa:
b²+8² = 10²
b² = 100-64
b² = 36
b = √36
b = 6 cm

a = z+b
a = 8+6 = 14 cm

P = (14+6)*8/2
P = 20*8/2
P = 160/2
P = 80 cm²
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