P = 1/2 · a · b · sinα
a = 10 cm
b = 8 cm
α = 45°
P = 1/2 · 10 cm · 8 cm · sin45°
P = 1/2 · 80 cm² · √2/2
P = 40 cm² · √2/2
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Verified answer
P = 1/2 · a · b · sinα
a = 10 cm
b = 8 cm
α = 45°
P = 1/2 · 10 cm · 8 cm · sin45°
P = 1/2 · 80 cm² · √2/2
P = 40 cm² · √2/2
P = 20√2 cm²