Which shape is always a rhombus? A. A rectangle because it has 2 pairs of parallel sides.
B. A square because it has 4 sides that are the same length.
C. An equilateral triangle because it has 3 sides that are the same length.
D. A quadrilateral because it has 4 sides.

B.A square because it has 4 sides that are the same length.

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