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Please someone help me, if you don't know the answer don't comment at all.

Preston says the sequence of transformations that maps triangle ABC onto triangle DEF is: rotate it 180 degrees about the origin, and then translate it up 7 units.

Chanel says the sequence of transformations that maps triangle ABC onto triangle DEF is: reflect it across the x-axis, then reflect it across the y-axis, and then translate it up 6 units and left 1 unit.
Part E
Now look at Chanel’s sequence. How does a reflection across the x-axis change the coordinates of a shape?

Part I
How does a translations 6 units up and 1 unit left change the coordinates of a shape?

Part K
Whose sequence proves triangle ABC is congruent to triangle DEF? Why?

Sagot :

Answer:

Part E  reflection across the x axis leaves the x value identical but negates the y value (x, y) → (x, -y)

Part I translating 6 up and 1 left subtracts one from the x value and adds 6 to the y value (x, y) → (x - 1, y + 6)

Part K Chanel has the correct sequence as following her instructions maps each point on triangle ABC perfectly to triangle DEF

Preston was close but he either needed to rotate about the origin 180° then translate up 6 and left 1, or rotate 180° about the point (-½, -½) and translate up 7.

I think the quickest conversion is to rotate 180° about the point (-½, 3)

Step-by-step explanation:

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