45
Reflection symmetry.
Bilateral symmetry
bikateral symmetry
radial symmetry
radial symmetry
IIt is not possible to list all the properties since more can be derived from the ones give. The basic one is that all three sides are of equal length. From this, it can be shown that all angles must also be equal, and so = 60 deg. Then you can show that the medians, altitudes, perpendicular bisectors of sides and angle bisectors are coincident. That means the centroid, circumcentre, incentre are the same. It has rotational symmetry of order 3 It has 3 axes of symmetry.
bilateral symmetry
bilateral symmetry
The lower case k, as shown in the question, has 0 lines of symmetry.
I regret that I can see no function shown.
a