EXERCISE 10B In the following figures, determine the value of x and y.
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Since x and angle 125° makes a linear pair.
Therefore,
x+125°=180°
⇒x=180°−125°=55°
Also, angle 125° is the exterior angle of given triangle.
As we know that exterior angle of a triangle is equal to the sum of the opposite interior angles.
∴60°+y=125°
⇒y=25°−60°=65°
Hence value of x and y are 55° and 65° respectively.
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