October 2018 1 31 Report
Estoy estudiando para el examen de geometria analitica ¿Pueden decirme si estoy bien?
AREA DE POLIGONO
X1=-3 X2=2 X3=6 Y1=2 Y2=9 Y3=3
= 1/2 (X1Y2+X2Y3+X3Y1)-(Y1X2+Y2X3+Y3X1)
= 1/2 ((-3)(9)+(2)(3)+(6)(2)) - ((2)(2)+(9)(6)+(3)(-3))
= 1/2 (-27+5+12)-(4+54-9)
= 1/2 (-10) - (49)
= 1/2 (-59/1)
= (59/2)
= 29.5

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