Odpowiedź:
a.
Pₐ =1/2× a×hₐ
a = 7 cm
hₐ= 4cm
Pₐ =1/2× a×hₐ = 1/2× 7 × 4 cm²
Pₐ = 14 cm²
b.
Pb =1/2× a×hb
a = 3 1/2 cm = 7/2 cm
hb= 4 3/7cm = 31/7 cm
Pb =1/2× a×hb = 1/2×7/2 ×31/7 cm²
Pb = 31/4 cm² = 7 3/4 cm ² = 7,75 cm²
Pb = 7,75 cm²
Szczegółowe wyjaśnienie:
