How do you convert - 135 degrees to radian?

To convert degrees to radians, you can use the following formula:

Radians = Degrees × (π / 180)

In this case, to convert -135 degrees to radians:

Radians = -135 × (π / 180)

Radians = -135π / 180

Now, you can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor, which is 45:

Radians = (-135/45)π / (180/45)

Radians = (-3π/45) radians

Finally, you can simplify the fraction further by dividing both the numerator and denominator by 3:

Radians = (-π/15) radians

So, -135 degrees is equal to -π/15 radians.