The figure shows ΔDEF and ΔD'E'F'. Fill in each entry box with the answer. The glide reflection that maps ΔDEF onto ΔD'E'F' is T º Ry = 1 where a = _ and b = _
Does the order of translations and reflection matter in the glide reflection? Answer yes or no.

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Step-by-step explanation:

Reflecting D over y=1 moves it to D'(-2, 4). An additional translation of (-2, 0) is required to move it to D'(-4, 4).

The translation only affects the x-coordinate, so can occur either before or after the reflection, which only affects the y-coordinate.

The order of transformations does not matter.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.