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# maths question (GCSE) watch

1. a paralelogram has sides of 7cm and 11cm and angles of 78* and 108*. calculate the length of the longest diagonal.

I know that its all about triganometry adn that, and sine and cosine rukles. but how the hell do i do it???? you have also got to include a diagram!!!!!!
a paralelogram has sides of 7cm and 11cm and angles of 78* and 108*. calculate the length of the longest diagonal.

I know that its all about triganometry adn that, and sine and cosine rukles. but how the hell do i do it???? you have also got to include a diagram!!!!!!
The angles are wrong, all sngles should add upto 360* in a 4 sided shape and in a parallelogram opposing angles are the same.

2*78 + 2*108 = 372

that's 12 degrees out.
3. this is what it says, exactly.

A parallelogram has sides 7cm and 11cm and angles of 72* and 108*.
Calculate the length of the longer diagonal of the parrallelogram/
this is what it says, exactly.

A parallelogram has sides 7cm and 11cm and angles of 72* and 108*.
Calculate the length of the longer diagonal of the parrallelogram/
5. thanx i kinda already know that.
thanx i kinda already know that.
A parralelogram is a quadrilateral though.
7. yeh,............................ ................................ ................................ ................................ ..well done
8. So what he's saying is- those angles don't add up to 360, so there is a problem? Do you get this?
If you're going to take that tone with people who are trying to help you then you might as well leave.
9. (Original post by hitchhiker_13)
So what he's saying it, those angles don't add up to 360, so there is a problem? Do you get this?
If you're going to take that tone with people who are trying to help you then you might as well leave.
Indeed.
10. Basically, the question's wrong.
11. next time you want to ask a ****in question mate, get it right in the first place, alright?

Don't come on here shoutin the odds, you sound like a very intellectual person.
12. Not.
this is what it says, exactly.

A parallelogram has sides 7cm and 11cm and angles of 72* and 108*.
Calculate the length of the longer diagonal of the parrallelogram/

You said 78 degrees at the start, therefore your fault.

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