Question

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:
Select one:
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.


I say A because if the triangle is 70,70,40 and the bisector is 40 I think that 40 and 40 would make it line of symmetry.

Answer 1

well its not D because an isosceles triangle cant be regular

Answer 2

Wait could it be B because if you add it all up its 180

Answer 3

B is a possibility but not because it adds up to 180

Answer 4

first you should draw out the triangle

Answer 5

okay

Answer 6

the bisector would go right through the middle