Question

The sun roof in Troy’s house is shaped like a rectangle. He increases the length of the sides of the sun roof to three times the existing ones. How will this change affect the perimeter of the sun roof?

It will be 12 times the original perimeter.

It will be 3 times the original perimeter.

It will be 18 times the original perimeter.

It will be 9 times the original perimeter.

Answer 1

@Calcmathlete

Answer 2

@jim_thompson5910

Answer 3

draw out a rectangle, any rectangle

Answer 4

what are the dimensions of this rectangle you drew out?

Answer 5

what's the perimeter of this rectangle?

Answer 6

12

Answer 7

good

Answer 8

now triple each dimension and tell me what the new perimeter is

Answer 9

36

Answer 10

so what happened from 12 to 36?

Answer 11

it was tripled

Answer 12

good

Answer 13

so if you triple each dimension, you're tripling the perimeter

Answer 14

oh, so the final perimeter will be 3 times the original

Answer 15

yes

Answer 16

Thanks

Answer 17

sure thing

Answer 18

do you need help