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Mila [183]
3 years ago
9

Interior and Exterior Triangle Angles (0/5)

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0

Answer:

<h3>      ∠R = 69</h3>

Step-by-step explanation:

<h2>Angle sum property</h2>

Sum of all angles of triangle = 180

     5x - 11 + 3x - 3 + 3x + 18 = 180

      5x + 3x + 3x  -11 - 3 + 18 = 180

Combine like terms

                             11x  + 4 = 180

                                   11x = 180 - 4

                                   11x = 176

                                      x = 176/11

                                       x = 16

∠R = 5x - 11

   = 5*16 - 11

   = 80 - 11

    = 69

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Step-by-step explanation:

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{ \tt{ {x}^{2}  + 4x - 3}}

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2 years ago
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3 0
3 years ago
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