The sum of the angles in the triangle must be equals to 180 degrees for it to be the angle measure of a triangle.
<h3>Angles in a triangle</h3>
The sum of angles in a triangle is equals to 180 degrees.
Therefore, adding up the three angles in a triangle must be equals to 180 degrees.
Hence,
42 + 34 + 56 = 132 degrees
This does not form a triangle.
35 + 80 + 65 = 180 degrees
This can be the angle measure of a triangle.
15 + 51 + 24 = 90 degrees
This cannot be the angle measure of a triangle.
18 + 42 + 120 = 180
This can be the angle measure of a triangle.
learn more on triangle angles here: brainly.com/question/15161714
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