Line segment ef is shown on a coordinate grid: the line segment is rotated 180 degrees counterclockwise about the origin to form e'f'. which statement describes e'f'? a e'f' is perpendicular to ef. b e'f' and ef are equal in length. c e'f' is half the length of ef. d e'f' is greater than twice the length of ef.

B. E'F' and EF are equal in length.

Step-by-step explanation:

The rotation has two main properties:-

1. Rotations preserve size ( includes sides and angles).

2. Lines connecting the center of rotation to the pre-image and the corresponding point on the image have equal length.

Given : The line segment is rotated 180 degrees counterclockwise about the origin to form E'F'.

Then, E'F' and EF are equal in length. ( by property 1.)

4.6875 pounds

step-by-step explanation:

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.