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How on earth do I do this?

Any ideas?:smile: thanks so much!
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Reply 1
Avatar for BabyMaths
BabyMaths
Can you work out the base of the rectangle? I'm sure you can.

What about the height?

Think about the little triangle on the left. Can you find its height in terms of x?
Reply 2
Avatar for madfish
madfish
OP
Original post by BabyMaths
Can you work out the base of the rectangle? I'm sure you can.

What about the height?

Think about the little triangle on the left. Can you find its height in terms of x?


yep I got the base of the rectangle to be 4-2x

the slanted height of the small triangle to be 2x

but I am unsure of how to he the height of the rectangle... does it involve Pythagoras? I have tried relentlessly to get the height but it;s just not working
Reply 3
Avatar for BabyMaths
BabyMaths
Original post by madfish
yep I got the base of the rectangle to be 4-2x

the slanted height of the small triangle to be 2x

but I am unsure of how to he the height of the rectangle... does it involve Pythagoras? I have tried relentlessly to get the height but it;s just not working


You could use Pythagoras' theorem: x^2+ h ^2 = (2x)^2

Alternatively use some basic trigonometry: tan(60) = h / x
Reply 4
Avatar for madfish
madfish
OP
Original post by BabyMaths
You could use Pythagoras' theorem: x^2+ h ^2 = (2x)^2

Alternatively use some basic trigonometry: tan(60) = h / x


I have tried these but still cannot get the answer :frown:
Reply 5
Avatar for BabyMaths
BabyMaths
Original post by madfish
I have tried these but still cannot get the answer :frown:


In that case you need to post your working.

How else can people help?
(edited 11 years ago)
Reply 6
Avatar for madfish
madfish
OP
Original post by BabyMaths
In that case you need to post your working.

How else can people help?

i got it to be 2sqrt3

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