All triangles have a total of 180 degrees for interior angles in Euclidean plane geometry
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Every triangle has three angles that total 180o. In an equilateral triangle, there are three 60o angles.
If all angles in a triangle are equal to 60 degrees, then the triangle is an equilateral triangle. In an equilateral triangle, all three sides are equal in length. This property is a consequence of the triangle angle sum theorem, which states that the sum of the interior angles of a triangle is always 180 degrees. Therefore, if each angle is 60 degrees, the total sum of the angles in the triangle is 180 degrees, satisfying the theorem.
The interior angles total up to 180 degrees and the exterior angles total up to 360 degrees.
Every triangle has three interior angles which total 180 degrees. A right triangle has one of the angles as 90 degrees.
The sum of the three interior angles in any triangle, no matter what size, shape,or special category the triangle is, is always exactly 180 degrees.The three interior angles in every triangle add up to the same total as the threeinterior angles in every other triangle do.