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Q: What is the measure of the third angle of a triangle is one angle measures 126.5 degrees and the other measures 19 degrees?

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It is a right angle triangle and the 3rd angle will measure 30 degrees

It is a right angle triangle and the 3rd angle will measure 30 degrees

77 degrees

20 degrees

25 degrees

105

45 degrees.

They each measure 60 degrees

If you mean an equilateral triangle then the 3rd angle is 60 degrees

Each angle measures 60 degrees

The missing angle measure is 100 degrees.

If the angles A, B and C forms a triangle, then angle A is 111 degrees.

The third angle measures 18 degrees.

If it's a triangle then the 3rd angle is 35 degrees

The other acute angle in that triangle is 40 degrees.

57.5 degrees

Obtuse triangle

right triangle

Any triangle that has an angle measuring 90 degrees is a right triangle.

It is a right angle triangle and its 3rd angle is 70 degrees.

The 3rd angle is: 180-92-45 = 43 degrees

180-120-35 = 25 degrees

The third angle is (128 degrees) minus (the second angle).

Each interior angle of an equilateral triangle measures 60 degrees

acute-angled triangle