青云翻译

Figure, c is the diameter ab ⊙ o on a fixed point, cross-over point c ⊙ o on the line d, e two points, and ∠ acd =

Figure c ?? a fixed point o on the diameter AB, point c of the line's ⊙ o to two points d, e, and ∠ ACD=

Like the chart, C is ⊙O on diameter AB a moving point, has selected C the straight line to hand over ⊙O Yu D, E two, also ∠ACD=

In the figure, C diameter O AB elementary school, for an interactive point, a point of C O straight to the primary school in D , ACD E two points, and management.

Figure c ?? a fixed point o on the diameter AB, point c of the line's ⊙ o to two points d, e, and ∠ ACD=