CK-12 Geometry - Second Edition

6.2. Properties of Parallelograms http://www.ck12.org

3. 3x+x+ 3 x+x= 360 ◦
   8 x= 360 ◦
   x= 45 ◦


4. 4x+ 2 = 90 ◦
   4 x= 88 ◦
   x= 22 ◦