Angle Between Two Lines

Angle Between Two Lines

## Formula

If two lines have slopes $$m_1$$ and $$m_2$$, then:

$$\tan\theta=\left|\frac{m_2-m_1}{1+m_1m_2}\right|$$

## Terminologies

- $$\theta$$ → Acute angle between the two lines.

- $$m_1,m_2$$ → Slopes of the two lines.

## Usage

- Used to find the angle between two non-vertical straight lines.