When are two triangles said to be in perspective? a. If the corresponding vertices of two triangles form three lines that intersect in a single point c. If the corresponding vertices of four triangles form three lines that intersect in a single point b. If the corresponding vertices of three triangles form three lines that intersect in a single point d. If the corresponding vertices of two triangles form three lines that intersect in two points. Please select the best answer from the choices provided A B C D