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Scrat [10]
3 years ago
7

∆STU is located at S (-3, 0), T (0, -3), and U (3, -3). Which statement correctly classifies ∆STU? A. ∆STU is a scalene triangle

. B. ∆STU is an isosceles triangle. C. ∆STU is an equilateral triangle. D. ∆STU is a right triangle.
Mathematics
1 answer:
AnnZ [28]3 years ago
5 0

Answer:

A. Scalene

Step-by-step explanation:

1)   Plot the three points and it is observe the three sides are different lengths

2)   Calculate lengths of three sides: (using c^2 = a^2 + b^2)

  length (ST) = sqrt( (-3 - 0)^2 + (0 - -3)^2 )

                     = sqrt( 9 + 9)

                     = sqrt( 18 )

                     = 4.24

  length (TU) = sqrt( (0 - 3)^2 + (-3 - -3)^2 )

                     = sqrt( 9 + 0)

                     = sqrt( 9 )

                     = 3

  length (SU) = sqrt( (-3 - 3)^2 + (0 - -3)^2 )

                     = sqrt( 36 + 9)

                     = sqrt( 45 )

                     = 6.71

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