BC=6x+6B, C, equals, 6, x, plus, 6, \qquad AB = 8x + 9AB=8x+9A, B, equals, 8, x, plus, 9, and \qquad AC = 141AC=141A, C, equals, 141,

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

step-by-step explanation: