What’s the value of x?

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Feb 7, 2018

Answer:

#x=40^°#

Explanation:

A slightly different way to do it.

Angles on a straight line add up to #180^°#. So the third angle in our triangle is #180-120=60#.

But the angles of a triangle also add up to #180#. So

#2x+x+60=180#

#rArr 3x=120#

#rArrx=40^°#

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Write your answer here...
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Answer

Write a one sentence answer...

Answer:

Explanation

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Jim G. Share
Feb 7, 2018

Answer:

#x=40#

Explanation:

#"the exterior angle "120^@" is equal to the sum of the"#
#"opposite interior angles 2x and x"#

#rArr2x+x=120#

#rArr3x=120rArrx=40#

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