Question

What is the perimeter of triangle ABC?

Answer 1

The triangles PQR and ABC are similar. The scale factor can be found by dividing the length of BC by the length of QR:\[scale\ factor=\frac{BC}{QR}=\frac{22.5}{9}=you\ can\ calculate\]
When you have found the scale factor it becomes possible to work out the length of the unknown side AC. The the lengths of the 3 sides of triangle ABC can be added to find the perimeter.

Answer 2

Then the*

Answer 3

88.75 inches

70 inches

15 inches

76.67 inches
Theses are the answer choices
and the sum is not one of them

Answer 4

@Samantha.s Have you calculated the scale factor?

Answer 5

That's the thing i have no idea how to do it :(

Answer 6

The scale factor is found by dividing 22.5 by 9:
\[scale \ factor=\frac{22.5}{9}=?\]

Answer 7

2.5

Answer 8

Correct. Now if you multiply the legth of side PR by the scale factor you will have found the length of AC:\[length\ of\ AC=6\times 2.5\]
The the perimeter of triangle ABC is found by adding the lengths of the three sides:
\[32.5+22.5+(6\times 2.5)=you\ can\ calculate\]

Answer 9

length*

Answer 10

70in
thank you

Answer 11

Correct. Good work.
You're welcome :)