CK-12 Geometry - Second Edition

1.3. Angles and Measurement http://www.ck12.org

4 a= 36

a= 9

3.CD= 51 ,DE= 10
8 x+ 3 + 3 x− 8 = 4 x+ 37
11 x− 5 = 4 x+ 37
7 x= 42
x= 6

4. Use the Segment Addition Postulate,AC=13.