Prove three angles of a triangle equal to 180 July 8, 2019 16 32 64 128 Prove that the sum of the three angles of a triangle is equal to 180 degree Prove that the sum of all three angles of a triangle is equal to 180 degree In a right triangle one angle measures x° where sin ° = x 4 5 . what is cos(90° − °) x 3 ba 4 12
