01: 54: 03
which transformation is not a rigid transformation?
dilation
b. reflection
c. rotation
d. translation
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Dilation

Step-by-step explanation:

A rigid transformation doesn't change the shape in any way but dilations change the size of it so it isn't a rigid transformation

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6