I'm terrible at math I know... But I'll mark brainliest for the right answer and must be explained! 20 POINTS

Hi there!
We know that a triangle has tri=3 angles. We also know that a triangle has 180 degrees. Therefore, the sum of all angles in a triangle is 180 Degrees.
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The sum of measures of these three triangles of any triangle is invariably equal to the straight line, also expressed as 180 degrees.