1. The problem statement, all variables and given/known data Three point particles are fixed in place in the xy plane. The three partiles sit on the corners of an equilateral triangle with sides of length a = 2.50 mm. Particle 1 has a mass m1 = 12.0 kg, particle 2 has a mass m2 = 18.0 kg, and particle 3 has a mass m3 = 15.0 kg. 1. What is the magnitude and direction of the net gravitational force exerted on particle 1 by the other two particles? 2. Relevant equations G((m1m2)/a2) and G((m1m3)/a2) 3. The attempt at a solution I'm trying to use the above equation and separate them by its x and y components. But I feel that because its an equilateral triangle I need to somehow make it into a right triangles so that the radius from mass 1 of both particles will be 30 degrees from mass 1 if I make mass 1 the origin. How do I attack this problem?