P = 1/2 · (a + b) · h
a, b → podstawy
h → wysokość
a = 4 cm + 4 cm = 8 cm
b = 4 cm
h = 5 cm
P = 1/2 · (8 cm + 4 cm) · 5 cm
P = 1/2 · 12 cm · 5 cm
P = 6 cm · 5 cm
P = 30 cm²
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P = 1/2 · (a + b) · h
a, b → podstawy
h → wysokość
a = 4 cm + 4 cm = 8 cm
b = 4 cm
h = 5 cm
P = 1/2 · (8 cm + 4 cm) · 5 cm
P = 1/2 · 12 cm · 5 cm
P = 6 cm · 5 cm
P = 30 cm²