Maths help please

6 replies

Katymac · 03/02/2007 19:26

If one side (the bottem) of a right angle triangle is 6m and the bottem angle is 30 degrees - how long is the hypotenuse???

Please

Thanks

OP posts:

ninja · 03/02/2007 19:30

cosine 30 = 6/h

so h = 6/(cos 30)

h = 6/(squareroot3 divided by 2)

h = 12/root 3

if they want decimals that's 6.93

Hope that helps

Original poster

Katymac · 03/02/2007 19:33

Thanks

I knew how to do that...once

OP posts:

ninja · 03/02/2007 19:35

I can't say it's the most useful thing I know how to do! Don't know what is though.

Original poster

Katymac · 03/02/2007 19:41

I bet you left school more recently than me

I am working out how many roofing panels I need

OP posts:

ninja · 03/02/2007 20:08

Bet I didn't! (I'm actually a maths teacher)

Original poster

Katymac · 03/02/2007 20:31

I'm 38 (I feel about 138 tonite)

Being a maths teacher is cheating

OP posts:

Flip