2.9 Angle Bisectors

 $\overrightarrow{US}$  bisects  $\angle BUL$  ,  $m\angle BUS=2x+10$  , and  $m<SUL=3x-18$  .  Find  $m<BUL$  .

•  $28^o$  

•  $52^o$  

•  $128^o$  

•  $132^o$  

 $m\angle TRI=3x-5,\ m<IRB\ =\ x\ +\ 27,\$  and  $m\angle TRB=86\degree.$    Does  $\overrightarrow{RI}$  bisect  $\angle TRB$  ?

• x=67
• x=43
• x=55
• x=12

Angle ABC measures 34^o.

What is the measure of angle CBD?

• 17^o

• 34^o

• 68^o

What does the word BISECT mean?

• To cut something into more than 5 pieces.

• Its an angle that measures 90

• A shape that has three sides. 
• To cut something into 2 congruent pieces