zad. I
a) P = a • h = 6cm • 7cm = 42cm²
b) P = e • f • ½ = 7cm • 12cm • ½ = 42cm²
zad. II
P = a • h = 5cm • 6cm = 30cm²
Obw = 2b + 2a = 2 • 7cm + 2 • 5cm = 14cm + 10cm = 24cm
zad. III
e = 6cm
f = 8cm
a = 5cm
P = e • f • ½ = 6cm • 8cm • ½ = 24cm²
Obw = 4a = 4 • 5cm = 20cm
;)