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Aleksandr-060686 [28]
3 years ago
11

Please help!? Work out the size of angle x. 42 degrees and 123 degrees?

Mathematics
2 answers:
vlabodo [156]3 years ago
5 0

Answer:

Sorry I don´t know the answer but I tried

Step-by-step explanation:

netineya [11]3 years ago
4 0

Answer:

x° = 99°

Step-by-step explanation:

Sum of angles on a straight line is 180°.

  • 180° - 123° = 57° (sum of angles on a straight line)

Sum of angles in a triangle is 180°. Let <em>u</em><em> </em>be the value of the unknown angle in the triangle.

  • 57° + 42° + u° = 180°

u° = 180° - 57° - 42°

u° = 81°

Sum of angles on a straight line is 180°.

  • x° + 81° = 180°

x° = 180° - 81°

x° = 99°

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