What do angles in a triangle have to add up to July 8, 2019 16 32 64 128 What do all angles in a triangle have to add up to In a right triangle one angle measures x° where sin ° = x 4 5 . what is cos(90° − °) x How to find sides of triangle with angles How to find the sides of a triangle How to find sides of triangles How to find two sides of a right triangle