Question

MEDAL & FAN ANYBODY ?
An isosceles triangle with angles 70°, 70° and 40° is reflected across the line that is the bisector of the 40° angle. The resulting transformed figure is exactly the same as the original figure, therefore:
a. The original triangle has a line of symmetry.
b. The original triangle has 180° rotational symmetry.
c. The scale factor of the dilation is exactly 1.
d. The triangle is a regular polygon.

Answer 1

I think it's D.