The sum of the angles of a triangle is 180 prove it July 8, 2019 16 32 64 128 The sum of the angles of a triangle is 180 degree prove it The sum of the angles of a triangle is 180 In a right triangle one angle measures x° where sin ° = x 4 5 . what is cos(90° − °) x Supplement of an angle Prove that the sum of the angles in a triangle is 180 degrees
