You are Here: Home >< Maths

# Surds

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.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register

Updated: September 18, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### Girlfriend studies instead of seeing me

Then says she misses me!

Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.