Stuck on a question in a practice paper
There is a right angled triangle ABC with AC as the hypotenuse. BC has length x-2. AB has length x+5. The question simply asks what is the perimeter as a number in cm. I couldn’t do it.
(edited 3 years ago)
Original post by uniformdan
There is a right angled triangle ABC with AC as the hypotenuse. BC has length x-2. AB has length x+5. The question simply asks what is the perimeter. I couldn’t do it.
Work out the hypotenuse in terms of x, using Pythagoras' Thoerem.
Then just add up all the lengths of the three sides.
Original post by RDKGames
Work out the hypotenuse in terms of x, using Pythagoras' Thoerem.
Then just add up all the lengths of the three sides.
Then just add up all the lengths of the three sides.
It asks for the perimeter in cm
Original post by uniformdan
It asks for the perimeter in cm
So? x-2 and x+5 will be in cm.
Have you posted the whole question? You can't solve for x without more information, but you can give an expression for the perimeter.
Original post by RogerOxon
So? x-2 and x+5 will be in cm.
It needs an integer in cm as the answer
Original post by uniformdan
It needs an integer in cm as the answer
Is there more to the question than you're letting on, then?
Original post by RogerOxon
So? x-2 and x+5 will be in cm.
Have you posted the whole question? You can't solve for x without more information, but you can give an expression for the perimeter.
Have you posted the whole question? You can't solve for x without more information, but you can give an expression for the perimeter.
There must be a mistake in the printing of the question, I have given all of the information, but thanks for the help👍
Original post by RDKGames
Is there more to the question than you're letting on, then?
There must be a mistake in the printing of the question, I thought there was too little information too, it can be done if I knew the hypotenuse
Original post by uniformdan
There must be a mistake in the printing of the question, I thought there was too little information too, it can be done if I knew the hypotenuse
But you can work it out via Pythagoras' Theorem ...
Yes but I need the perimeter as an integer, not in terms of ‘x’. Im not sure how to get there
Original post by RDKGames
But you can work it out via Pythagoras' Theorem ...
Original post by uniformdan
Yes but I need the perimeter as an integer, not in terms of ‘x’. Im not sure how to get there
If they do not give you any extra information then they want it in terms of x.
Original post by RDKGames
Work out the hypotenuse in terms of x, using Pythagoras' Thoerem.
Then just add up all the lengths of the three sides.
Then just add up all the lengths of the three sides.
I need to actually solve for ‘x’ in order to workout the perimeter
Original post by uniformdan
I need to actually solve for ‘x’ in order to workout the perimeter
No, just write it as an expression entirely in terms of x and job done.
Original post by RDKGames
If they do not give you any extra information then they want it in terms of x.
Ok thank you
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