Question
✓
Answer
- 45º
Solution:
We have.
$\theta+\phi=180^\circ$ [$\because$ AOD is a straight line]
$\Rightarrow3\phi+\phi=180^\circ [\because\theta=3\phi]$
$\Rightarrow4\theta=180^\circ$
$\Rightarrow\phi=45^\circ.$
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