Q: Do all triangles have the same sum of their angles?

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The sum of the interior angles on an Obtuse Triangle is 1800 . This is true of ALL triangles.

Yes.

The sum of the internal angles always equals 180o

they all have three sides, three angles, and the sum of their angles is always 180 degrees.

The sum of the 3 angles of a triangle will ALWAYS equal 180 degrees.

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No, sum of all angles of any kind of triangles has 180 degrees.

The sum of the interior angles on an Obtuse Triangle is 1800 . This is true of ALL triangles.

Yes.

The sum of the internal angles always equals 180o

they all have three sides, three angles, and the sum of their angles is always 180 degrees.

The sum of the angles in all triangles (right, isosceles, scalene, and equilateral) in the Euclidean plane is 180 degrees or pi.

The sum of the 3 angles of a triangle will ALWAYS equal 180 degrees.

there r 800 vetices in three triangles

180

If you accept that the sum of the angles in a triangle is 180 degrees, then picture this. A quadrilateral shape is two triangles. If you draw a line between one pair of opposite corners in quadrilateral shape, you have two triangles that share a common side. The sum of the angles in the quadrilateral must equal the sum of the angles in the two triangles. 2 x 180 = 360

This has to do with the way in which the sum of the angles is derived. First you select a point inside the polygon and then join that point to each of the vertices. For a polygon with n sides, this gives rise to n triangles. The sum of the 3 angles of any triangle is 180 degrees. So the sum of the angles of all the triangles is n*180 degrees. Now, the "outer" angles of these triangles correspond to the interior angles of the polygon. But the sum also includes the angles formed arounf the central point. The sum of all the angles around this central point is 360 degrees. This is not part of the sum of the interior angles of the polygon and so must be subtracted. Thus, the interior angles of a polygon sum to n*180 - 360 degrees or 180*(n- 2) degrees.

well to have a sum you need more than one angle. a triangle is a good example of a sum of angles getting to 180 degrees. all triangles angles sum to 180 degrees