The angles of a triangle measure x°,2x°, x degrees comma 2 x degrees commaand 3x°. 3 x degreesClassify the triangle by its angles.
Use the strategy Systematic Guess and Check.
Continue until the sum of the measures is 180°.180 degrees
Classify the triangle.
x°x degrees 2x°2 x degrees 3x°3 x degrees Sum of Angle Measures Result
10 20 30 60 Too low
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20 40 60 120 Too low
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30 60 90 180 The triangle is an acute triangle.