Zoe need a to buy beads to make jewelry. for each earring, zoe uses 3 small blue beads, 1 small metallic bead, and 2 large green beads. what is the total number of beads zoe will need to buy to make 8 pair of earrings

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.