What is required for two triangles to be similar?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work