MCQ
In Fig. $AOB$ is a straight line. If $\angle\text{AOC}+\angle\text{BOD}=85^\circ,$ then $\angle\text{COD}=$ 
- A$90^\circ$
- B$85^\circ$
- ✓$95^\circ$
- D$100^\circ$
✓
Answer
Correct option: C.
$95^\circ$
Given,
$AOB =$ Straight line
$\angle\text{AOC}+\angle\text{BOD}=85^\circ$
$\angle\text{AOC}+\angle\text{COD}+\angle\text{BOD}=180^\circ $(Linear pair)
$85^\circ+\angle\text{COD}=180^\circ$
$\angle\text{COD}=95^\circ.$
$AOB =$ Straight line
$\angle\text{AOC}+\angle\text{BOD}=85^\circ$
$\angle\text{AOC}+\angle\text{COD}+\angle\text{BOD}=180^\circ $(Linear pair)
$85^\circ+\angle\text{COD}=180^\circ$
$\angle\text{COD}=95^\circ.$
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