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steffanie1995

  • 2 years ago

matrices help?

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  1. steffanie1995
    • 2 years ago
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    what is the area of the triangle withe the vertices (-1,-4), (-3,-2) and (-4,-2) A. 1 B. 1.5 C. 21.5 D. 23

  2. jishan
    • 2 years ago
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    |dw:1368644792810:dw|

  3. steffanie1995
    • 2 years ago
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    ?

  4. jishan
    • 2 years ago
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    by using formula

  5. jishan
    • 2 years ago
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    1/2.x1(y2-y3)+x2(y3-y1)+x3((y1-y2)

  6. steffanie1995
    • 2 years ago
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    so would it be c?

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