Question

My test will start in 30 min , Please solve it !!​

Answer 1

Answer:

( 2 , 3 ) ( -3 , -5 ) ( -4 , -2 )

x1 y1 x2 y2 x3 y3

= 1/2 |X1(y2-y3) + X2(y3-y1) + X3(y1-y2)|

= 1/2 |2(-5+2) + -3(-2-3) + -4(3+5) |

= 1/2 | 2(-3) + -3(-5) + -4(8) |

= 1/2 | -6 +15 -32 |

= 1/2 | -38 +15 |

= 1/2 | -23 |

= -23/2

= -11.5