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I need help with this question

 

 Jun 8, 2018

Best Answer 

 #1
avatar+971 
+2

Since lines AB aned DE are parallel, angle ABC is equal to angle BCE. 

 

Therefore, ACB = 180 - 50 - 80 = 50

 

Since ACB = 50, BAC = 180 - 80 - 50 = 50 

 

The three angles of the triangle are 50, 50, 80. 

 

This means that the triangle is isosceles.

 

smiley

 Jun 8, 2018
 #1
avatar+971 
+2
Best Answer

Since lines AB aned DE are parallel, angle ABC is equal to angle BCE. 

 

Therefore, ACB = 180 - 50 - 80 = 50

 

Since ACB = 50, BAC = 180 - 80 - 50 = 50 

 

The three angles of the triangle are 50, 50, 80. 

 

This means that the triangle is isosceles.

 

smiley

GYanggg Jun 8, 2018

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