Figure EFGH on the grid below represents a trapezoidal plate at its starting position on a rotating machine platform:

The plate is rotated 270° about the origin in the counterclockwise direction. Which of the following is formed when the arcs of rotation are drawn for each point as it is rotated?

They form parallel segments.
They form perpendicular segments.
They form concentric circles.
They form congruent segments.

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Can someone check if i did this correct. it’s number 4 if you’re wondering.

In the triangles, bc =de and ac fe. if the mzc is greater than the mze, then ab isdfelth