<PRE><B>Question 301121</B>
The sum of the angles of a triangle is 180 degrees.

Let x = the two angles in this triangle which are congruent.

x + x + 120 = 180

2x + 120 = 180

2x = 180 - 120

2x = 60

x = 60/2

x = 30

Each of the other two angles measures 30 degrees.

Here is the proof:

Let x = 30

30 + 30 + 120 = 180

60 + 120 = 180

180 = 180...It checks!

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