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- #1

- Feb 5, 2012

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**Mariam T-yan of Facebook writes:**

Please help me so I can graduate

1.A triangular pyramid begins with these coordinates:

P(0, 5, 4)

Y(–2, 7, 4)

R(0, 7, 4)

A(0, 7, 6)

The pyramid is then reflected over the xz-plane. The reflected image is then translated 3 units back, 2 units left, and 4 units up. Determine the coordinates of that final image, following these steps:

• Write the general rule you use for the reflection.

• Show the results of your calculations for the reflection.

• Write the general rule you use for the translation. (Hint: Begin with the result of the rule for the reflection.)

• Show the results of your calculations for the translation.