Quandaries and Queries
 

 

Who is asking: Student
Level: Middle

Question:
how can u prove sum of angles in a triangle equal to 180 degrees?

 

 

Hi,

Look at the triangle ABC and extend the line segment BC to a point P. Draw a line segment CD, parallel to AB.

Since AB and CD are parallel what can you say about the angles CAB and ACD? What about angles ABC and DCP?

Penny

 
 

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