Answers choices are
two 90 angles
two 20 angles
two 80 angles
two 40 angles

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

How can you construct perpendicular lines and prove theorems about perpendicular lines

Are the corresponding angles congruent? explain why or why not.