Please help!? Work out the size of angle x. 42 degrees and 123 degrees?
2 answers:
Answer:
Sorry I don´t know the answer but I tried
Step-by-step explanation:
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.
u° = 180° - 57° - 42°
u° = 81°
Sum of angles on a straight line is 180°.
x° = 180° - 81°
x° = 99°
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