Q:

# Line segment AB is shown on a coordinate grid: A coordinate grid is shown from positive 6 to negative 6 on the x-axis and from positive 6 to negative 6 on the y-axis. A line segment AB is shown with A as ordered pair 1, 3 and B as ordered pair 5, 3. The line segment is rotated 270 degrees counterclockwise about the origin to form A'B'. Which statement describes A'B'? A'B' is parallel to AB. A'B' is half the length of AB. A'B' and AB are equal in length. A'B' is greater than twice the length of AB.

Accepted Solution

A:
Answer:The statements which describe A'B' is:A'B' and AB are equal in length ⇒ (B)Step-by-step explanation:Let us take about reflication:⇒ Reflections are mirror images, means the shape or the size of    the figure does not affect by reflection, think of "folding" the    graph over the y-axis or the x-axis⇒ On a grid, you used the formula (x, y) → (-x, y) for a reflection in     the y-axis and used the formula (x, y) → (x, -y) for a reflection in     the x-axis.In our question segment AB, where A = (1, 3) and B = (5, 3) isreflected about the y-axisBy using the rule above∴ A' =(-1, 3)∴ B' = (-5,3)∵ Reflection does not change the shape or the size of the original figure∴ Line segment A'B' has the same length of line segment ABThe correct answer is:A'B' and AB are equal in lengthYou can check your answer by finding the lengths of AB and A'B'∵ The length of AB = 5 - 1 = 4 units∵ The length of A'B' = -1 - (-5) = -1 + 5 = 4 units∴ AB = A'B'Note:If the y-coordinates of two points are equal, then the line joining them is horizontal and its length is the difference between the x-coordinates of the two points.