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# Surds Watch

1. Doing a worksheet on surds right now and I'm stuck on this one question. I'd be grateful if someone could give any hints or explain how to do the question. Sorry!!

the question:
The sides of a rectangle are in the ratio 2:3. The diagonal is of length 26cm. Find the perimeter.
2. (Original post by theweirdo)
Doing a worksheet on surds right now and I'm stuck on this one question. I'd be grateful if someone could give any hints or explain how to do the question. Sorry!!

the question:
The sides of a rectangle are in the ratio 2:3. The diagonal is of length 26cm. Find the perimeter.
Let the sides by and , then pythagoras tells you that .

What does the ratio between the sides tell you about another relationship between and ?

Use those two equations to solve for x and y, then add them together.
3. (Original post by theweirdo)
Doing a worksheet on surds right now and I'm stuck on this one question. I'd be grateful if someone could give any hints or explain how to do the question. Sorry!!

the question:
The sides of a rectangle are in the ratio 2:3. The diagonal is of length 26cm. Find the perimeter.
You're told it's a ratio which would be the same as a ratio for some multiple of .

Let one side equal and the other equal .

The perimeter is

Use Pythagoras to work out since you are told the diagonal.
4. (Original post by theweirdo)
Sorry!!
Thinking you have to apologise is...
Spoiler:
Show
absurd.

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