Odpowiedź:
a)
P = 1/2 * a * h
P = 1/2 * 9cm * 3cm = 1/2 * 27cm² = 13,5cm²
b)
P = 1/2 * 15cm * (8cm + 12cm) = 7,5cm * 20cm = 150cm²
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Odpowiedź:
a)
P = 1/2 * a * h
P = 1/2 * 9cm * 3cm = 1/2 * 27cm² = 13,5cm²
b)
P = 1/2 * 15cm * (8cm + 12cm) = 7,5cm * 20cm = 150cm²