5.3 - Triangles

5.3 - Triangles

Multiple Choice

How can you classify angles 2 and 8?

• Alternate Exterior

• Alternate Interior

• Corresponding Angles

• Vertical Angles

Multiple Choice

How could you classify angles 1 and 5?

• Corresponding Angles

• Alternate Exterior

• Alternate Interior

• Linear Pair

Multiple Choice

How could you classify angles 3 and 4?

• Linear Pair

• Vertical Angles

• Alternate Interior

• Alternate Exterior

Multiple Choice

How could you classify angles 4 and 6?

• Alternate Interior

• Alternate Exterior

• Corresponding Angles

• Linear Pair

Fill in the Blanks

If you were to add all the angles inside a triangle, how many degrees would the sum be?

• "Interior" angles that are on the side of a triangle​

• ​x + y + z = 180

• It is the same for every triangle that you have!​

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p. 390 in book​

Interior Angles of Triangles​

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Displayed is the Antigua​ and Barbuda national flag. Write an equation to find the measure of the missing angle x.

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​How many degrees is in a triangle? What does the box mean?

​Let's Try It!

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​Let's Try It!

​Equation:

How do you read the symbols/notation?​

Fill in the Blanks

Use the given triangle to find the missing angle measure for x.

Just type in the number for your answer, no variables or label

Fill in the Blanks

Use the given picture to find the missing value for angle x.

Only type in the value, no labels

Fill in the Blanks

You are given $\Delta ABC$   with $m\angle A\ =\ 32.5$  and the $m\angle C\ =\ 65.7$  , what is $m\angle B$  ?

​How to solve?

​Let's Try!

What are your questions so far?​

The sum of the interior angles of any triangle = 180 degrees!​

​Some text here about the topic of discussion.

​Exterior Angles of Triangles

• ​Interior Angles?

• Exterior Angles?

• Adjacent Angles

• Remote Interior/Opposites​

​What can you tell me about the sum of angles 1, 2, and 3?

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What can you tell me about the angles 3 and 4?​

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Finding an Exterior Angle​

​What is the value of x?

Some text here about the topic of discussion

Multiple Choice

What is the value of the exterior $$\angle x$$  ?

• 161

• 19

• 180

• 81

Fill in the Blanks

What is the value of x?

Multiple Choice

Suppose the $$m\angle5\ =\ 147\degree$$  , what is $$m\angle1$$  ?

• $$57\degree$$  

• $$90\degree$$  

• $$47\degree$$  

• $$27\degree$$  

What are your questions about today?​