SSA
Consider and . Which parts of these two triangles are equal (based on what is shown here)? Do you think these triangles are congruent?
(Scroll down for more questions when you have answered this part.)
Now, drag the point D (if you have not done so).
Answer again the previous questions:
(a) which parts of these triangles are equal?
(b) are these triangle congruent?
Have you changed your answers? Why?