Which statement about this figure is true? It has no reflectional symmetry.

It has rotational symmetry with an angle of rotation of 45°.

It has point symmetry.

It has reflectional symmetry with one line of symmetry

Consider the diagram. which line segment has the same measure as st? rx tx sr xs

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.