Question

find the circumcenter of the triangle

1.( 1/2, -1 )

2. (-1, 1/2)

3.(-3, 1/2)

4.( -1, -2)

Answer 1

perpendicular bisector of (-3,-7) and (1,-7) is x=-1
perpendicular bisector of (-3,-7) and (-3,3) is y=1/2

so the both intersects at (-1, 1/2)

hence 2.(-1, 1/2)

Answer 2

The rotational symmetry of a shape explains that when an object is rotated on its own axis, the shape of the object looks the same.

Hope it will be helpful :)