Question

Given parallelogram ROCK and angle R = 121, find angle O.

Answer 1

Given data:

The given parallelogram.

The adjacent angles in parallelogram are supplementary in nature.

`m\angle R+m\angle O=180^(\circ)`

Substitute the given values in the above expression.

`\begin{gathered} 121^(\circ)+m\angle O=180^(\circ) \\ m\angle O=59^(\circ) \end{gathered}`

Thus, the angle O is 59 degrees.