find x in the following with clear explanation and clear photo
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1. x=70
2. x=17
3. x=125
4. x=41
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Step-by-step explanation:
1) angle BCD = 180° --------( straight angle )
angle acd = 123°
angle acb = ?
therefore acb+ acd = BCD
therefore acb+ 123 = 180
therefore acb = 180-123
therefore acb = 57°
in triangle ABC ,
angle a + angle b + angle c = 180° -------( sum of all angle of triangle is 180°)
therefore 56+b+57= 180°
therefore b= 180 - 113
therefore b= 67°
therefore X= 67°
3) angle a + angle b + angle c = 180°------( sum of all angle of triangle is 180° )
therefore 25° + X + 30° = 180°
therefore x= 180-55
therefore X = 125°
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