Show that the sum of the angles of a triangle is 180

- Show that the sum of the angles of a triangle is 180°
- Show that the sum of the angles of a triangle is 180 degree
- Show that the sum of the interior angles of a triangle is 180
- Show that the sum of the three angles of a triangle is 180
- In a right triangle one angle measures x° where sin ° = x 4 5 . what is cos(90° − °) x
- Angle sum of polygons