What relationship exists regarding the angles in a triangle?

Answer 1

• The interior angles of a triangle always add up to 180°
• Because the interior angles always add to 180°, every angle must be less than 180°
• The bisectors of the three interior angles meet at a point, called the incenter, which is the center of the incircle of the triangle.

Note The interior angles only add to 180° when the triangle is planar, meaning it is lying on a flat plane. If the triangle is not planar, for example if it is lying on the curved surface of a sphere, the angles do not add to 180°.

Answer 2

The sum of the angles is 180°.