How to draw isosceles triangle intuitively, online, etc. With the help of good people! ! ! !
Step 1: In the known regular triangle ABC, draw the corresponding X' axis and Y' axis with the straight line where AB is located as the X axis and the symmetry axis CO as the Y axis, so that ∠ x' O' y' = 45. Step 2: Take O'A'=OA, O'B=OB, and Y' on the X' axis. Oc。 Step 3: connect A' c' and B' c'. Triangle A'B'C is the direct view of regular triangle ABC.