Mathematics

In the figure, AOB is a straight line. The measure of $$\Delta COD$$ is equal to 


ANSWER

$$100^0$$


SOLUTION
$$AOB$$ is a straight line 

$$\therefore x+{ 20 }^{ \circ  }+2x-{ 20 }^{ \circ  }+{ 60 }^{ \circ  }={ 180 }^{ \circ  }$$

$$\Rightarrow 3x={ 180 }^{ \circ  }-{ 60 }^{ \circ  }\\$$
$$ \Rightarrow x={ 40 }^{ \circ  }$$

$$\\ \angle COD=2x+{ 20 }^{ \circ  }\\ $$
$$\angle COD=(2\times { 40 }^{ \circ  })+{ 20 }^{ \circ  }={ 100 }^{ \circ  }$$
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