1. The problem statement, all variables and given/known data A proton and an electron form two corners of an equilateral triangle of side length 5.3 x 10-6 m. What is the magnitude of the net electric field these particles produce at the third corner? 2. Relevant equations E=kQ/r^2 3. The attempt at a solution I drew a triangle with an electron and a proton as the corners. I'm thinking of using Pythagorean theorem or something then solve this with the formula by dividing the distance. I'm sort of confused but i do know that the answer will be negative.