Объяснение:
S=a*b*sinα=10*8*sin30=1/2 * 80 = 40 см²
S=a*b*sinα=10*8*sin45=80 * √2/2 = 40√2 см²
S=a*b*sinα=10*8*sin60=80 * √3/2 = 40√3 см²
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Объяснение:
S=a*b*sinα=10*8*sin30=1/2 * 80 = 40 см²
S=a*b*sinα=10*8*sin45=80 * √2/2 = 40√2 см²
S=a*b*sinα=10*8*sin60=80 * √3/2 = 40√3 см²