In what section of the line will there be a point where the resultant electric field is zero?

In what section of the line will there be a point where the resultant electric field is zero? 10) An equilateral triangle is formed from three rods, each of length 10 cm. Two of the rods carry charge +63 nC uniformly distributed along the length of each rod, while the third carries charge -63nC, also uniformly distributed along the rod. What is the magnitude of the electric field at the center of the triangle?