12G
  • 12G
plz help
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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12G
  • 12G
The vertices of a quadrilateral ABCD are A(−3, 4), B(−4, 1), C(−7, 2), and D(−7, 6). The vertices of another quadrilateral EFCD are E(−11, 4), F(−10, 1), C(−7, 2), and D(−7, 6). Which conclusion is true about the quadrilaterals? Their corresponding diagonals are equal. The measures of their corresponding angles are not identical. The lengths of their corresponding sides are unequal. Their shapes and sizes are not identical.
12G
  • 12G
i think its A
12G
  • 12G
@lvana

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12G
  • 12G
@Michele_Laino
welshfella
  • welshfella
work out the distances between the points for example length of the side AB = sqrt[ (-4--3)^2 + (1 - 4)^2] = sqrt(1 + 9) = sqrt10 length of EF = sqrt(1 + (-3)^20 = sqrt10 so measure of AB = measure of EF
12G
  • 12G
so A
welshfella
  • welshfella
well those are not diagonals the diagonals are AC and EC , and BD and FD.
welshfella
  • welshfella
check those out AC = sqrt[ (-7--3)^2 + (2-4)^2] = sqrt( 20) do the same calculation for EC
welshfella
  • welshfella
if that comes to sqrt20 then those 2 diagonals are equal

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