Question

The length of an equilateral triangle is the same as the length of a rectangle and the width of the rectangle is 2 inches less than its length. If the perimeter of the triangle is 4 inches less than the perimeter of the rectangle, what are the dimensions of the rectangle?

Answer 1

I would like to do it using algebra

Answer 2

Let the length of the triangle be x.
So the perimeter of the triangle=3x
Let the width of the rectangle=y
y=x-2
Perimeter of the rectangle=2(x+y)
=2(x+x-2)
=2(2x-2)
=4x-4
3x=4x-8
Can u find x nw?

Answer 3

3x=4x-8
+8
Then it would become:
8+3x=4x
-3x -3x
Then it would be:
8=x

Answer 4

Is that correct?

Answer 5

yeah u r right.:)
Nw find y.

Answer 6

Can u?

Answer 7

I would have to use y=x-2?

Answer 8

right?

Answer 9

ya

Answer 10

y=x-2
-x=-x
So it would be:
-x+y=-2

I don't think that is right :/

Answer 11

y=8-2
nw can u?

Answer 12

subtract 8-2=6
y=6

Answer 13

I'm sure that's right

Answer 14

nw u hav the dimensions of the rectangle.

Answer 15

Thank you so much.

Answer 16

u r welcome.