Angle Addition Postulate

Calculate m∠ABC.

• 45°

• 60°

• 105°

• 15°

Calculate m∠DEF.

• 180°

• 60°

• 120°

• 80°

Name a point in the interior of <PQR.

• P

• Q

• W

• R

 Find  $\angle HIW$  if  $\angle HIJ\ =\ 164\degree$  and  $\angle WIJ\ =\ 140\degree$  

•  $\angle HIW\ =\ 304\degree$  

•  $\angle HIW=16\degree$  

•  $\angle HIW=40\degree$  

•  $\angle HIW=24\degree$  

Find  $\angle IJY$  if  $\angle IJK=122\degree,\ \angle IJY=14x+2$  and  $\angle YKJ=26x$  .

•  $\angle IJY=3\degree$  

•  $\angle IJY=6\degree$  

•  $\angle IJY=86\degree$  

•  $\angle IJY=44\degree$  

Find x if    $\angle STB=x+49,\ \angle BTU=x+108$ , and  $\angle STU=141\degree$  . 

 

• x =  $-8$  

• x = 33

• x = 92

• x = 39

 $\angle JKU=3x-9,\ \angle UKL=138\degree$  and    $\angle JKL=15x-3$  . Solve for x. 

• x = 49

• x = 9.4 

• x = 11

• x = 8.3

 $\angle ECD=122\degree$  and  $\angle BCE=36\degree$ . Find the measure of  $\angle BCD$  . 

•  $\angle BCD=158\degree$  

•  $\angle BCD=86\degree$  

•  $\angle BCD=58\degree$  

•  $\angle BCD=144\degree$  

 Find  $\angle HIW$  if  $\angle HIJ\ =\ 164\degree$  and  $\angle WIJ\ =\ 140\degree$  

•  $\angle HIW\ =\ 304\degree$  

•  $\angle HIW=16\degree$  

•  $\angle HIW=40\degree$  

•  $\angle HIW=24\degree$  

Right, acute, or obtuse?

• Acute
• Right
• Obtuse