Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the corre
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Answer: Reflection about x-axis
Step-by-step explanation:
Given
Initially, vertices are
After reflection they become
It is clear that the x coordinate remains unchanged and the y coordinate changes its sign. It occurs when reflection is done about the x-axis.
For example, when (a,b) is reflected about the x-axis, it becomes (a,-b).
So, here reflection is being done about the x-axis.
Look at the picture.
The angle y° and 71° are Supplementary Angles. Therefore y° + 71° = 180°.
The sum of measures of these three angles of any triangle is invariably equal to 180°.
Therefore we have the equation:
