IGCSE Angle Basics

If the  $m\angle9=122\degree,$  what is  $m\angle10$  and which rule did you use?

•  $122\degree$  
  

•   $68\degree$  

•  $58\degree$  
  

• Consecutive interior angles are supplementary.

• Consecutive exterior angles are supplementary.

11) Given the two parallel lines cut by a transversal,

What is the measure of $\angle4$  if  $m\angle8=76\degree$  ?

Which of the following is NOT an example of supplementary angles?

•  $\angle7\ and\ \angle8$  

•  $\angle2\ and\ \angle3$  

•  $\angle1\ and\ \angle7$  

•  $\angle6\ and\ \angle4$  

Practice 2: What is the supplement of 74.3 degrees?

• $105.7\degree$

• $180\degree$

• $148.6\degree$

• $15.7\degree$

Classify the relationship between  $\angle6\ and\ \angle18$  

• alternate interior angles

• alternate exterior angles

• corresponding angles

• consecutive interior angles

Find  $m\angle2.$  

•  $131\degree$  

•  $180\degree$  

•  $49\degree$  

Practice 4d: If the $m\angle3=\ 140\degree$  , what is the  $m\angle2+m\angle4?$  

•  $40\degree$  

•  $80\degree$  

•  $120\degree$  

•  $220\degree$  

Which of the following angles would NOT be congruent to the measure of  $\angle7$ ?

•  $\angle2$  

•  $\angle3$  

•  $\angle6$  

•  $\angle8$  

Which angles are vertical angles?

Find the missing angle.

• 29° 
• 39° 
• 49° 
• 59°