i don't know but i wan't to know what is the answer then i can answer the question....
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Not always. It depends where the line of symmetry is located.
translation: is a slide reflection : is a flip roation: you rotate the triganle around like 180 degrees
yup.
Of course. A reflection of any symmetric shape about a line perpendicular to its axis of symmetry will be a rotation of 180 degrees around the point on its axis of symmetry which is halfway between the pre-image and the image.
Work out the difference between 180 and 171 (9) and divide that by 180. Multiply that by 100 to get the percentage difference (5%)