7cm

25cm
24cm
Suppose the triangle in the diagram was dilated using a scale factor of 2. What is the perimeter of the dilated triangle?

(1 point)
Responses

56 cm
56 cm

112 cm
112 cm

28 cm
28 cm

168 cm

1 answer

To find the perimeter of the dilated triangle, first calculate the perimeter of the original triangle.

The sides of the original triangle are:

  • 7 cm
  • 25 cm
  • 24 cm

Calculate the perimeter of the original triangle:

\[ \text{Perimeter} = 7 , \text{cm} + 25 , \text{cm} + 24 , \text{cm} = 56 , \text{cm} \]

Now, since the triangle is dilated using a scale factor of 2, each side of the triangle is multiplied by 2. Therefore, the sides of the dilated triangle will be:

  • \(7 , \text{cm} \times 2 = 14 , \text{cm}\)
  • \(25 , \text{cm} \times 2 = 50 , \text{cm}\)
  • \(24 , \text{cm} \times 2 = 48 , \text{cm}\)

Now, calculate the perimeter of the dilated triangle:

\[ \text{Perimeter of dilated triangle} = 14 , \text{cm} + 50 , \text{cm} + 48 , \text{cm} = 112 , \text{cm} \]

So, the perimeter of the dilated triangle is 112 cm.