Week 11, Math, Chapter 5, Lesson 3, Angles of Triangles

​Week 11, Math, Chapter 5, Lesson 3, Angles of Triangles

Multiple Choice

What is the sum of the interior angle measures of a triangle?

• $$100\degree$$  

• $$90\degree$$  

• $$180\degree$$  

• $$360\degree$$  

Multiple Choice

$$what\ type\ of\ angle\ is\ \angle\ 2$$   ?

• Interior angle

• Exterior angle

• Reflex angle

• Right angle

Multiple Choice

$$what\ type\ of\ angle\ is\ \angle\ 4$$   ?

• Interior angle

• Exterior angle

• Reflex angle

• Right angle

Multiple Choice

$$what\ is\ the\ measure\ of\ angle\ is\ \angle\ LKM$$   ?

• $$60\degree$$  

• $$90\degree$$  

• $$120\degree$$  

• $$180\degree$$  

Multiple Choice

$$Suppose\ m\ \angle\ 2\ =45\degree.\ Find\ the\ measure\ of\ angle\ is\ \angle\ 4\ ?$$  

• $$110\degree$$  

• $$90\degree$$  

• $$45\degree$$  

• $$135\degree$$  

Multiple Choice

$$Find\ the\ measure\ of\ angle\ is\ \angle\ x\ ?$$  

• $$109\degree$$  

• $$120\degree$$  

• $$71\degree$$  

• $$180\degree$$  

Multiple Choice

$$Find\ the\ measure\ of\ angle\ is\ \angle\ x\ ?$$  

• $$50\degree$$  

• $$165\degree$$  

• $$65\degree$$  

• $$180\degree$$  

​Week 11, Math, Chapter 5, Lesson 3, Angles of Triangles

L.O: Determine the missing exterior angle measure in triangle​

-Identify the exterior angles and remote angles

​-State that the measure of an exterior angle is equal to the measures of it's two remote angles.

​​Beonze

​Determine the measure of an exterior angle from any given triangle.

​​Silver

​Analyze triangles and find the missing interior angles using the exterior angle theorem

​​Gold

​

​New Key words

​Exterior angle: is an angle formed by one side of triangle and the extension of the adjacent side

Remote interior angles:​ are angles that are not adjacent to the exterior angle.

​Key words

​Adjacent: on the same side of a straight line when intersected by another line

​

​Name all interior angles?

​

​Name all exterior angles?

​

​Name all interior angles? 1,2,3

​

​Name all exterior angles? 4,5,6

​

​What type of angle is angle 1 and 2?

​

​What type of angle is angle 4 and 5?

​

​What type of angle is angle 1 and 2? Interior

​

​What type of angle is angle 4 and 5? Exterior

​

​- Exterior angles of triangle Theorem

" The measure of an exterior angle of a triangle is equal to the sum of the measures of it's TWO remote angles " 

​Key Concept Page 391

​Research - 2 minutes

the most famous triangle building designs in the UAE

​Question

what type of triangle is the design?

​The Emirates Towers is a building complex in Dubai that contains the Emirates Office Tower and Jumeirah Emirates Towers Hotel

​ 

​ 

 

 ​

-Identify the exterior angles and remote angles

​-State that the measure of an exterior angle is equal to the measures of it's two remote angles.

​​Beonze

​Determine the measure of an exterior angle from any given triangle.

​​Silver

​Analyze triangles and find the missing interior angles using the exterior angle theorem

​​Gold

​

​10 minutes- Work Sheets

Multiple Choice

$$what\ type\ of\ angle\ is\ \angle\ 2$$   ?

• Interior angle

• Exterior angle

• Reflex angle

• Right angle

Multiple Choice

$$what\ type\ of\ angle\ is\ \angle\ 4$$   ?

• Interior angle

• Exterior angle

• Reflex angle

• Right angle

Multiple Choice

$$what\ is\ the\ measure\ of\ angle\ is\ \angle\ LKM$$   ?

• $$60\degree$$  

• $$90\degree$$  

• $$120\degree$$  

• $$180\degree$$  

Multiple Choice

$$Suppose\ m\ \angle\ 2\ =45\degree.\ Find\ the\ measure\ of\ angle\ is\ \angle\ 4\ ?$$  

• $$110\degree$$  

• $$90\degree$$  

• $$45\degree$$  

• $$135\degree$$  

Multiple Choice

$$Find\ the\ measure\ of\ angle\ is\ \angle\ x\ ?$$  

• $$109\degree$$  

• $$120\degree$$  

• $$71\degree$$  

• $$180\degree$$  

Multiple Choice

$$Find\ the\ measure\ of\ angle\ is\ \angle\ x\ ?$$  

• $$50\degree$$  

• $$165\degree$$  

• $$65\degree$$  

• $$180\degree$$