Similar triangles

Task

Move the points B and C and watch the interior angles and the sides of the triangle.[br]Which connections can you find?

Which of the following statements are correct? [br]Tick the right answers!

If I move point B or C, the size of one angle changes. [br] If I move point C, only the angles in the second triangle change. In similar triangles the angles are always equal. The size of the angles in both triangles do not change, even if I change the length of the sides.

Information: Similar triangles