### Home > PC > Chapter 1 > Lesson 1.4.2 > Problem1-147

1-147.

Change the following degree measures to radians. Use exact values.

Use a Giant One of $π \text{ rad}/180º$.

1. $120º$

$120 ^ { \circ } \cdot \frac { \pi \text { radians } } { 180 ^ { \circ } }$

$\frac{2}{3}\ \pi\text{ radians}$

1. $-225º$

Follow a similar process as shown in part (a).

1. $80°$

Follow a similar process as shown in part (a).