In Δ ABC, AB is the diameter, ∴∠ACB = 90°, and Δ ABC is a right triangle.
As we all know, AD⊥CD and δ ACD are right triangles.
Ac bisection ∠DAB, DAC = cab,
∴δdac∽δcab。
What else do you need to know? Please ask questions,
What are the benefits of "one" mathematical thinking training?
In fact, purely from the perspective of children's own development,