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The angle between the line joining the p...

The angle between the line joining the points `(1,-2) , (3,2)` and the line `x+2y -7 =0` is

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The correct Answer is:
`pi//2`
`x+2y-7=0`
Slope of line (i) `m_1=(1)/(2)`
Slope of line `PQ=m_2=(2-(-2))/(3-1)=2`
where `P-=(1,-2)` and `Q-=(3,2)`.
Since `m_1,m_2=-1` the angle between line (1) and line `PQ is pi//` .
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