Express the angle in radian measure.-135°- - -

To express the angle in radian measure, we need to convert it from degrees to radians.

Step 1: Convert the angle from degrees to radians using the conversion factor: 1 radian = π/180 degrees.

-135° * (π/180) = -135π/180 radians

Step 2: Simplify the expression if possible.

-135π/180 radians can be simplified by dividing both the numerator and denominator by the greatest common divisor, which is 45.

-135π/180 radians = -3π/4 radians

Therefore, the angle -135° is equivalent to -3π/4 radians.