Question

find the exact perimiter of the rectangle. then approximate your answer. square root 18cm and square root 72cm

Answer 1

\[\sqrt{18} and \sqrt{72}\]

Answer 2

\[2\sqrt{18}+2\sqrt{72}=6\sqrt{2}+6\sqrt{2}=12\sqrt{2}\]

Answer 3

Any questions?

Answer 4

ok I get

Answer 5

Good

Answer 6

how do I get the approx?

Answer 7

doesnt seem to work right I get 0

Answer 8

I would approximate the sq rt of 2 as 2.14 as it is an irrational value

Answer 9

excuse me 1.414 lol

Answer 10

that doesnt seem right either it says 14 and it should be in the 100s?

Answer 11

The perimeter is approx 17

Answer 12

How do you figure in the 100s?

Answer 13

ok

Answer 14

The sides are 4.3 cm and 8.5 cm add up the 4 sides for perimeter 8.6 +17=25.6 which is quite a bit diffrerent than 17.......thinking

Answer 15

I see the problem\[2\sqrt{72}=12\sqrt{2}\]
not 6 sq r2 2

Answer 16

\[6\sqrt{2}+12\sqrt{2}=18\sqrt{2}\] thats more better.

Answer 17

That is the exact , the approximate is 25.45 cm

Answer 18

did you see where I goofed\[2\sqrt{72}=2\sqrt{36}\sqrt{2}=12\sqrt{2}\]

Answer 19

Is it clear now SaraJ?"

Answer 20

Yes I was wondering why it wasnt comming out right, LoL